Friez model 712 aerograph
Date: 1943-1950
Inventory Number: DW0446
Classification: Aerograph
Subject:
Maker: Friez Instrument Division, Bendix Aviation Corporation (ca. 1940 - 1966)
User: United States Navy (founded 1775)
User: George R. Agassiz Station, Harvard (1951 - 1982)
User: Harvard College Observatory (founded 1839)
Cultural Region:
Place of Origin:
Dimensions:
33 x 28.5 x 19 cm (13 x 11 1/4 x 7 1/2 in.)
Accessories: lid; stack of aerograph paper; metal case
Description:
An instrument combining a barograph-hydrograph and recording thermometer in an aluminum enclosure, which is rectangular, with rounded corners. The instrument enclosure has metal rings attached to metal tabs at the four corners, for aerial work. The enclosure is housed inside another aluminum storage case, which is hinged, with a handle and latched closure.
The instrument case has a pair of windows which run along one corner, through which may be seen recording drum wrapped in graph paper, connected to the instrument's aneroid barometer, recording a continuous record of atmospheric pressure over time. Four recording arms inscribe data on the drum.
The instrument case has a pair of windows which run along one corner, through which may be seen recording drum wrapped in graph paper, connected to the instrument's aneroid barometer, recording a continuous record of atmospheric pressure over time. Four recording arms inscribe data on the drum.
Signedon base: FRIEZ INSTRUMENT DIVISION
on instrument enclosure, stylized logo, silver lettering on black circle: FRIEZ / BALTIMORE / Reg. U.S. Pat. Office.
on spool paper: NORFOLK SALVAGE COMPANY / NORFOLK, VA.
on instrument enclosure, stylized logo, silver lettering on black circle: FRIEZ / BALTIMORE / Reg. U.S. Pat. Office.
on spool paper: NORFOLK SALVAGE COMPANY / NORFOLK, VA.
Inscribedstorage case has a typed label which reads: PLACE BOTTOM OF INSTRUMENT TO REAR / OF CASE, WITH WINDOW FACING RIGHT
metal plate on base: CHART NO. 448 G(?), INK NO. 10 & 20, PENS NO. 12
on separate brass plate: AERO 1943 U.S.N. NO. 198-44
metal plate on base: CHART NO. 448 G(?), INK NO. 10 & 20, PENS NO. 12
on separate brass plate: AERO 1943 U.S.N. NO. 198-44
FunctionFor measuring and recording temperature, humidity and pressure in upper atmosphere.
ProvenanceFrom the Agassiz Station, Harvard College Observatory. Brought to the Collection in 1969.