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Catalog Data

Maker:
Huddleston, John S. F.  Search this
Winlock, Joseph  Search this
Measurements:
overall: 14 3/4 in x 8 1/2 in x 4 in; 37.465 cm x 21.59 cm x 10.16 cm
Object Name:
psychrometer
Object Type:
Patent Model
Place made:
United States: Massachusetts, Boston
Date made:
1873
Description:
This is the model that Joseph Winlock, a professor of astronomy at Harvard College, and John S. F. Huddleston, a thermometer and barometer maker in Boston, submitted along with their patent application in 1873. The wet bulb thermometer is mounted on a brass plate that is marked "HUDDLESTON BOSTON" and graduated every degree Fahrenheit from +10 to +115. The dry bulb thermometer is missing.
The wooden tower holds a rotating chart that indicates relative humidity, and carries a brass plate graduated every degree from +6 to +113. The patent described "a simple, efficient, and convenient means of determining the relative humidity of the atmosphere or the dew-point, so called, without calculation."
Ref: J. Winlock and J. S F. Huddleston, "Psychrometer," U.S. Patent 149176 (issued 1874).
Location:
Currently not on view
ID Number:
PH.309319
Catalog number:
309319
Accession number:
89797
Patent number:
149,176
See more items in:
Medicine and Science: Physical Sciences
Thermometers and Hygrometers
Measuring & Mapping
Data Source:
National Museum of American History
GUID:
http://n2t.net/ark:/65665/ng49ca746a9-fa48-704b-e053-15f76fa0b4fa
EDAN-URL:
edanmdm:nmah_1167496