Equilateral Prism
Object Details
- Description
- This equilateral glass prism was probably owned and used by Henry Draper, the New York physician who did pioneering work in astronomical photography and spectroscopy. The “J. A. HILGER / 192 / TOTTENHAM COURT ROAD / LONDON W.” inscription in the lid of the case is that of Johann Adam Hilger (1839-1867), a German artisan who moved to London around 1870, set up shop at this address in 1875, and dropped his first name soon thereafter.
- Ref. George F. Barker, “Memoir of Henry Draper,” Biographical Memoirs of the National Academy of Sciences (1888), pp. 81-139.
- Location
- Currently not on view
- Data Source
- National Museum of American History
- associated dates
- 1915 05 14 / 1915 05 14
- ID Number
- PH.314847
- accession number
- 58310
- catalog number
- 314847
- maker
- Hilger, Adam
- Object Name
- equilateral prism
- Case
- Physical Description
- glass (overall material)
- wood (case material)
- leatherette (case material)
- satin (case material)
- gold leaf (case material)
- Measurements
- average spatial: 51 cm x 5.24 cm x 5.24 cm; 20 1/16 in x 2 1/16 in x 2 1/16 in
- average spatial: 51 cm x 5.24 cm x 5.24 cm; 20 1/16 in x 2 1/16 in x 2 1/16 in
- overall: 2 1/16 in x 2 1/16 in x 2 1/16 in; 5.23875 cm x 5.23875 cm x 5.23875 cm
- average spatial; case: 6 cm x 6.9 cm x 6.5 cm; 2 3/8 in x 2 23/32 in x 2 9/16 in
- case: 2 1/2 in x 2 5/8 in x 2 3/8 in; 6.35 cm x 6.6675 cm x 6.0325 cm
- place made
- United Kingdom: England, London, City of London
- associated place
- United States: District of Columbia, Washington
- See more items in
- Medicine and Science: Physical Sciences
- Record ID
- nmah_1077082
