Directions for using the improved achromatic telescope
notes: label: Description
content: First page of the “Directions” for using the improved achromatic telescope made by W. & S. Jones of London. Andrew Ellicott (1754-1820), American surveyor and geodesist, used a telescope of this sort to observe the moons of Jupiter, to determine longitude on earth. That telescope is now in the Museum collections.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Physical Sciences
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.310346.01
label: accession number
content: 116914
label: catalog number
content: 310346.01
objectType: label: Object Name
content: book page
physicalDescription: label: Measurements
content: overall: 5 in x 7 1/2 in; 12.7 cm x 19.05 cm
label: Measurements
content: overall with backing: 7 13/16 in x 5 5/16 in x 1/2 in; 19.84375 cm x 13.49375 cm x 1.27 cm