{"event":"ecommerce_event","event_name":"view_item","event_category":"browse_catalog","ecommerce":{"items":[{"item_id":"XTD82558","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"mexican_school","item_category5":"balown","item_list_name":"search_results","item_name":"copy_of_a_fragment_of_the_dresden_codex_showing_mayan_astronomical_calculations_engraving","item_variant":"undefined"},{"item_id":"CHT162794","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"reisch_gregor_d_1525","item_category5":"not_balown","item_list_name":"search_results","item_name":"allegory_of_arithmetic_from_margarita_philosophica_by_gregor_reisch_1503_woodcut","item_variant":"undefined"},{"item_id":"XIR226108","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"italian_school_16th_century","item_category5":"balown","item_list_name":"search_results","item_name":"mathematics_lesson_from_a_mathematical_treatise_w_c_on_paper","item_variant":"undefined"},{"item_id":"STC444658","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"solvyns_franz_balthazar_1760_1824_after","item_category5":"not_balown","item_list_name":"search_results","item_name":"a_dyback_or_astrologer_from_costumes_of_india_by_e_orme_1804_coloured_etching","item_variant":"undefined"},{"item_id":"TRK7133634","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"trigonometric_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133619","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"optics_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133628","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"different_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"CHT223767","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"reisch_gregor_d_1525","item_category5":"not_balown","item_list_name":"search_results","item_name":"allegory_of_astronomy_from_an_edition_of_margarita_philosophica_by_gregor_reisch_published_in_basel_","item_variant":"undefined"},{"item_id":"IL994193","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"burton_h_m_20th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"omar_khayyam_works_out_the_calendar_1074ad_litho","item_variant":"undefined"},{"item_id":"TRK7133611","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"dynamics_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133614","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"hydrodynamics_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133624","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"astronomy_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133612","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"dynamics_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133622","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"astronomy_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133633","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"architectural_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133613","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"dynamics_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133618","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"hydrodynamics_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133641","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"trigonometric_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133626","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"astronomy_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"LIP1614686","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"m_jacques_inaudi_engraving","item_variant":"undefined"},{"item_id":"LLM6004992","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_20th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"chaldaean_system_of_numerals_litho","item_variant":"undefined"},{"item_id":"TRK7133621","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"figures_with_different_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"CJP107574","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"wyatt_benjamin_dean_1775_1850","item_category5":"not_balown","item_list_name":"search_results","item_name":"design_for_the_duke_of_york_s_column_london_pen_ink_and_w_c_on_paper","item_variant":"undefined"},{"item_id":"TRK7133607","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"page_with_algebraic_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133616","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"fluid_dynamics_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133625","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"figures_with_different_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133609","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"page_with_algebraic_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"ACD236326","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"fizeau_armand_hippolyte_louis_1819_96","item_category5":"not_balown","item_list_name":"search_results","item_name":"letter_describing_fizeau_s_experiments_to_determine_the_velocity_of_light_1849_pen_ink_on_paper","item_variant":"undefined"},{"item_id":"TRK7133620","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"figures_with_different_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133627","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"physical_astronomy_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133610","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"page_with_trigonometric_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133615","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"fluid_dynamics_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133605","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"page_with_algebraic_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133617","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"fluid_dynamics_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"JAB7147183","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"french_school_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"lithiasis_stony_calculations_and_concretions_1887_engraving","item_variant":"undefined"},{"item_id":"ACD236328","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"fizeau_armand_hippolyte_louis_1819_96","item_category5":"not_balown","item_list_name":"search_results","item_name":"letter_describing_fizeau_s_experiments_to_determine_the_velocity_of_light_1849_pen_ink_on_paper","item_variant":"undefined"},{"item_id":"LLM3653644","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"napier_s_bones_or_rods_engraving","item_variant":"undefined"},{"item_id":"ACD236327","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"fizeau_armand_hippolyte_louis_1819_96","item_category5":"not_balown","item_list_name":"search_results","item_name":"letter_describing_fizeau_s_experiments_to_determine_the_velocity_of_light_1849_pen_ink_on_paper","item_variant":"undefined"},{"item_id":"EPL6905552","item_category":"photo","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"flammarion_photo","item_variant":"undefined"},{"item_id":"TRK7133608","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"page_with_conic_section_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"CH3502590","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"adams_george_1750_95","item_category5":"not_balown","item_list_name":"search_results","item_name":"gunners_rule_brass_see_also_3502589","item_variant":"undefined"},{"item_id":"RAF53250","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"lazzari_sebastiano_fl_c_1770","item_category5":"not_balown","item_list_name":"search_results","item_name":"trompe_l_oeil_with_still_life_of_strawberries_and_a_parrot","item_variant":"undefined"},{"item_id":"CHT176311","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"antoniadi_eugene_michel_19th_20th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"maps_of_the_planet_mars_astronomical_observations_made_by_antoniadi_at_the_observatoire_de_juvisy_un","item_variant":"undefined"},{"item_id":"CH3502591","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_18th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"gunners_rule_brass_see_also_3502592","item_variant":"undefined"},{"item_id":"UIG531627","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"unknown_artist_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"artist_s_impression_of_urbain_jean_joseph_leverrier_c_1880_engraving","item_variant":"undefined"},{"item_id":"CH3502589","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"adams_george_1750_95","item_category5":"not_balown","item_list_name":"search_results","item_name":"gunners_rule_brass_see_also_3502590","item_variant":"undefined"},{"item_id":"CH3502592","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_18th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"gunners_rule_brass_see_also_3502591","item_variant":"undefined"},{"item_id":"FGL5457036","item_category":"illustration","item_category2":"undetermined_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"astrologer_nostradamus_1503_1566","item_variant":"undefined"},{"item_id":"FGL5486892","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"navigational_instruments_an_astronomer_or_navigator_using_a_crossbow_or_crossbow_or_jacob_s_stick_to","item_variant":"undefined"},{"item_id":"XOS847282","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"caron_antoine_1520_99","item_category5":"balown","item_list_name":"search_results","item_name":"dionysius_the_areopagite_converting_the_pagan_philosophers_1570s_oil_on_panel","item_variant":"undefined"},{"item_id":"XJF359054","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"dutch_school_17th_century","item_category5":"balown","item_list_name":"search_results","item_name":"johann_adam_schall_von_bell_from_china_illustrata_by_athanasius_kircher_1667_engraving","item_variant":"undefined"},{"item_id":"UIG5426067","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"engraving_from_a_13th_century_manuscript_depicting_an_astronomy_lesson_the_central_figure_is_shown_u","item_variant":"undefined"},{"item_id":"GIA4792133","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"unknown_artist_16th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"an_astronomer_doing_calculations_using_a_sextant_during_an_eclipse_engraving_of_the_16th_century","item_variant":"undefined"},{"item_id":"AVE6319870","item_category":"footage","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"united_states_1970s_man_writes_calculations_on_board","item_variant":"undefined"},{"item_id":"LRI4672478","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"le_cat_claude_nicolas_1700_1768","item_category5":"not_balown","item_list_name":"search_results","item_name":"instruments_for_extracting_bladder_calculations_forceps_and_lithotritor_photography","item_variant":"undefined"},{"item_id":"MEB859502","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"sangallo_antonio_da_the_younger_1483_1546","item_category5":"not_balown","item_list_name":"search_results","item_name":"plan_design_layout_of_an_obelisk_in_piazza_del_popolo_rome_1519_pen_on_paper","item_variant":"undefined"},{"item_id":"AVE8905675","item_category":"footage","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"1960s_technician_making_calculations_with_a_circular_slide_rule","item_variant":"undefined"},{"item_id":"EVB2938228","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"calculating_machine_designed_by_french_mathematician_blaise_pascal_in_1642_when_he_was_nineteen_year","item_variant":"undefined"},{"item_id":"CHT248210","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"french_school_17th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"frontispiece_of_le_grand_banquier_de_france_ou_le_livre_des_monnaies_etrangeres_by_bertrand_francois","item_variant":"undefined"},{"item_id":"GG80845","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"flemish_school_16th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"portrait_of_a_scholar_possibly_a_mathematician_aged_36_panel","item_variant":"undefined"},{"item_id":"MEB859501","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"sangallo_antonio_da_the_younger_1483_1546","item_category5":"not_balown","item_list_name":"search_results","item_name":"ideal_reconstruction_of_the_augustan_obelisk_in_rome_1519_dark_brown_ink_on_paper","item_variant":"undefined"},{"item_id":"LRI4623633","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"unknown_artist_15th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"greek_astronomer_claudius_ptolemy_using_a_compass_to_make_calculations_miniature","item_variant":"undefined"},{"item_id":"ROC5674273","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"vinci_leonardo_da_1452_1519","item_category5":"not_balown","item_list_name":"search_results","item_name":"studies_of_the_valves_of_the_heart_and_sketch_of_a_suditary_and_calculations_c_1511_13_pen_ink_on_bl","item_variant":"undefined"},{"item_id":"EPL6959724","item_category":"photo","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"mortar_calculations_fort_wright_fishers_island_new_york","item_variant":"undefined"},{"item_id":"EPL7009400","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"galileo_galilei_italian_astronomer","item_variant":"undefined"},{"item_id":"EPL6827427","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"george_costard","item_variant":"undefined"},{"item_id":"MEV5049545","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"italian_school_9th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"argumenta_paschalia_by_dionysius_exiguus_c_497_545_801_20_parchment","item_variant":"undefined"},{"item_id":"AVE8905674","item_category":"footage","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"1960s_circular_slide_rule_being_used_to_make_calculations","item_variant":"undefined"},{"item_id":"ATH2656923","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"copley_john_singleton_1738_1815","item_category5":"not_balown","item_list_name":"search_results","item_name":"study_for_lord_north_1779_80_chalk_on_paper","item_variant":"undefined"},{"item_id":"LLM5198945","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"wyatt_henry_1794_1840_after","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_astronomer_from_the_picture_in_the_vernon_gallery_engraving","item_variant":"undefined"},{"item_id":"TRK7291298","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"lemaitre_augustin_francois_1797_1870","item_category5":"not_balown","item_list_name":"search_results","item_name":"russian_merchant_makes_calculations_by_means_of_an_abacus_engraving_19th_century","item_variant":"undefined"},{"item_id":"CH469081","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"tinguely_jean_1925_91","item_category5":"not_balown","item_list_name":"search_results","item_name":"untitled_letter_to_felix_leu_1966_felt_tip_pen_crayon_on_paper","item_variant":"undefined"},{"item_id":"TRK879441","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"circumference_of_the_earth_leonardo_da_vinci_1452_1519_developed_a_novel_way_to_measure_the_area_of_","item_variant":"undefined"},{"item_id":"PNP377477","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"american_school","item_category5":"not_balown","item_list_name":"search_results","item_name":"theodore_de_bry_litho","item_variant":"undefined"},{"item_id":"LLM5198866","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"george_herbert_s_poem_vanitie_engraving","item_variant":"undefined"},{"item_id":"XJF311618","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school","item_category5":"balown","item_list_name":"search_results","item_name":"technical_drawings_pen_ink_on_paper","item_variant":"undefined"},{"item_id":"UIG547284","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"india_jaipur_jantar_mantar_built_for_astronomical_calculations_by_maharajah_of_jaipur","item_variant":"undefined"},{"item_id":"JB331187","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category4":"bethell_john","item_category5":"not_balown","item_list_name":"search_results","item_name":"yanta_mantar_instrument_to_make_calculations_built_1728_34_photo","item_variant":"undefined"},{"item_id":"XIR95894","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"french_school_17th_century","item_category5":"balown","item_list_name":"search_results","item_name":"calculating_machine_invented_by_blaise_pascal_1623_62_wood_metal","item_variant":"undefined"},{"item_id":"LLJ583814","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"who_wants_any_petty_calculations_fit_for_any_young_man_just_setting_up_in_business_coloured_engravin","item_variant":"undefined"},{"item_id":"ROC8598606","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"vinci_leonardo_da_1452_1519","item_category5":"not_balown","item_list_name":"search_results","item_name":"calculations_with_architectural_engineering_and_geometric_sketches_c_1492_94_pen_ink_with_black_chal","item_variant":"undefined"},{"item_id":"NCO189738","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"gillray_james_1757_1815","item_category5":"not_balown","item_list_name":"search_results","item_name":"smelling_out_a_rat_or_the_atheistical_revolutionist_disturbed_in_his_midnight_calculations_published","item_variant":"undefined"},{"item_id":"CH15834","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"vinci_leonardo_da_1452_1519","item_category5":"not_balown","item_list_name":"search_results","item_name":"studies_of_the_illumination_of_the_moon_fol_1r_from_codex_leicester_c_1506_08_pen_ink_on_paper","item_variant":"undefined"},{"item_id":"EVB2938229","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"mechanisms_of_gottfried_leibniz_s_calculator_the_most_advanced_of_its_time_which_perform_all_four_ba","item_variant":"undefined"},{"item_id":"BL6335279","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_18th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"volume_iv_loose_papers_of_mathematical_calculations_and_annotations_by_thomas_harriott_add_ms_6785_f","item_variant":"undefined"},{"item_id":"JAN1078178","item_category":"illustration","item_category2":"in_copyright","item_category3":"premium","item_category4":"annett_jeremy","item_category5":"not_balown","item_list_name":"search_results","item_name":"variations_29a","item_variant":"undefined"},{"item_id":"JB331186","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category4":"bethell_john","item_category5":"not_balown","item_list_name":"search_results","item_name":"hemispheres_and_sundial_yanta_mantar_instrument_to_make_calculations_built_1728_34_photo","item_variant":"undefined"},{"item_id":"UIG538385","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"in_the_space_capsule_calculations_making_the_narrator_s_head_spin_from_jules_verne_autour_de_la_lune","item_variant":"undefined"},{"item_id":"DPA7391280","item_category":"object","item_category2":"no_copyright","item_category3":"standard","item_category4":"schoening","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_mechanism_for_antikythera_205_bc_bronze","item_variant":"undefined"},{"item_id":"BL3264129","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"vinci_leonardo_da_1452_1519","item_category5":"not_balown","item_list_name":"search_results","item_name":"arundel_263_f_220v_f_221_notes_mathematical_calculations_from_codex_arundel_pen_ink_on_paper","item_variant":"undefined"}]}}

{"event":"custom_event","event_name":"view_search_result","event_category":"browse_catalog","keyword":"calculations","search_type":"standard","search_bridgeman_artists":"false","search_mode":"automatic","search_zero_result":"false","search_results":375,"search_results_page_number":1}