Theodolite
name: label: maker
content: Secretan, Marc Francois
notes: label: Description
content: This theodolite is marked "Secretan a Paris." It was made after 1855 when Marc François Secretan went into business on his own, and before 1901 when the Smithsonian purchased it from Anthony J. Gies, commissioner of streets and drainage in Manila, for use in the Pan American Exhibition. It resembles the instrument that Secretan called a repeating theodolite. The horizontal circle is silvered, graduated to 10 minutes, and read by four verniers and two magnifiers to 20 seconds. The vertical circle is silvered, graduated to 15 minutes, and read by two double verniers to 30 seconds.
label: Description
content: Ref: L'Industrie Française des Instruments de Précision, <i>Catalogue</i> (Paris, 1901–1902), pp. 247–252.
label: Location
content: Currently not on view
place: label: place made
content: France: Île-de-France, Paris
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Surveying and Geodesy
label: See more items in
content: Measuring & Mapping
publisher: label: Related Publication
content: L'Industrie Française des Instruments de Précision. Catalogue
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.318454
label: catalog number
content: 318454
label: accession number
content: 36555
objectType: label: Object Name
content: theodolite
physicalDescription: label: Measurements
content: overall: 12 in; 30.48 cm
label: Measurements
content: horizontal circle: 5 1/4 in; 13.335 cm
label: Measurements
content: vertical circle: 3 3/4 in; 9.525 cm
label: Measurements
content: telescope: 12 in; 30.48 cm
label: Measurements
content: needle: 2 1/4 in; 5.715 cm
label: Measurements
content: overall: 12 1/8 in x 7 1/2 in x 12 1/4 in; 30.7975 cm x 19.05 cm x 31.115 cm