TH=his is a grey metal case containing a clock-driven rotating drum in an enclosed chamber. In an adjacent section there is a bi-metal strip for measuring temperature and a (horse?) hair bundle for measuring humidity. Each substance actuates a separate recording arm that records temperature and humidity data, respectively, onto a chart clipped to the rotating drum. The drum can be set to rotate either daily or weekly. This device has a temperature chart attached to the drum. The pen is missing from the humidity recording arm.
Accession Number: 2011.bot.1
Primary Materials: Metal, Glass, Paper, Hair (horse?)
The front of the unit has a metal manufacturer’s label reading “Ser. No. 4466; Model 594; Part No. AW – 500054.; Friez Instrument Division, Bendix Aviation Corporation; Baltimore; Maryland”. “Plant Pathology C. E. C. 1” is written in red embossed tape (from a label-maker) on the front of the instrument. Information for purchasing supplies is provided on a metal tag fixed to the floor of the instrument.
The bottom of the recording drum (?) is stamped “FRIEZ INSTRUMENT DIVISION; BENDIX AVIATION CORPORATION; BALTIMORE MD USA.” There is also a red ink stamp that is too blurred to read.
Cardboard Chart: “MS Chart No. 87”; Marked in pencil from “Mon. Feb. 13 / 16 to Sun. Feb. 19 / 67”. Also marked “C. E. C. #1”.
Height = 21.5, Width = 14.3, Length = 30.6
Measurement and recording of temperature and humidity. Used in plant pathology.
Good: Some corrosion on metal surfaces. Some hairs are worn or unattached. The clockwork in the rotating cylinder no longer winds.
Friez Instrument Division, Bendix Aviation Corporation, Baltimore, Maryland, USA.
Date of Manufacture: c. 1940-60
Acquired from Botany in 2004 with the assistance of Keioko Yoshioka. Last recorded date on attached chart on drum is Feb. 1967.
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