Directions for using the improved achromatic telescope
notes: label: Description
content: Second 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.310346.02
label: catalog number
content: 310346.02
label: accession number
content: 116914
objectType: label: Object Name
content: book page
physicalDescription: label: Measurements
content: overall on backing: 7 7/8 in x 5 5/8 in x 9/16 in; 20.0025 cm x 14.2875 cm x 1.42875 cm