spherical thermometer
Date1925-1950
Inventory Number1998-1-0272
ClassificationThermometer
Subject
Maker
Raytheon Manufacturing Company
founded 1925
Cultural Region
Place of Origin
Dimensions6.2 x 6.2 x 6.2 cm (2 7/16 x 2 7/16 x 2 7/16 in.)
Material
DescriptionA metal sphere with a thin metal ring running along its circumference with a scale both sides of it. The scale is engraved in metal, and goes from 100 to 400 degrees with numbers alternating between the two sides (likely Fahrenheit). No part on the outside of the sphere can show a temperature reading, and the ring is entirely made of metal. It appears to contain a liquid or some loose parts inside.
Signedengraved: RAYTHEON MFG CO
Inscribedengraved: THERMO-SPHERE PATENT PENDING 100-400 DANGER
FunctionPresumably for placing in a pot of boiling water or grease and measure the temperature of the liquid. Unknown how the reading is taken.
Henry J. Green
Date: 1890-1910
Object number: 1998-1-1270c
Henry J. Green
Date: 1900-1910
Accessories: single thermometer back
Object number: 1998-1-1269
Henry J. Green
Date: 1885-1910
Object number: BH0042
Fabre et Cie
Date: circa 1856
Object number: 5468
Henry J. Green
Date: 1885-1910
Object number: 1998-1-1252
John Cuthbertson
Date: 1770-1815
Accessories: brown storage box, descriptive tag, thin strip of paper in box with the inscription "lucernal microscope" in David P. Wheatland's handwriting (which refers to figs. 47-48 and 51 in this series), page from the book "Old Science and Medicine" with a photographic copy of the first print from this series, entitled "The Large Electric Machine at Haarlem."
Object number: 1998-1-1087
Taylor Instrument Companies
Date: 1910-1930
Object number: 1998-1-1410
Negretti and Zambra
Date: 1900-1920
Object number: 1998-1-1263
Henry J. Green
Date: 1900-1910
Object number: 1998-1-1265