Bauhaus-Universität Weimar

Titel:
L. E. Knott Apparatus Company: Scientific Instruments, Catalogue 26
Person:
Knott, L. E.
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit13684/88/
SCIENTIFIC INSTRUMENTS 
83 
47-10 “ SLING ” PSYCHROMETER for determining humidity more rapidly and accurately than 
possible with the stationary wet and dry bulb instruments. The handle is swiveled to metal strip 
carrying the thermometers................................................................$7.60 
47-16 MASON’S HYGROMETER (Wet and Dry Bulb) for determining the relative and absolute humidity 
and dew point. Magnifying mercury-filled tubes on black oxidized brass scales. On polished hard¬ 
wood back............................................................................. 6.76 
47-20 WEATHER BUREAU PATTERN HYGROMETER (Wet and Dry Bulb). Two thermometers 
(No. 46-30) mounted as illustrated with nickel-plated brass cistern on polished wood back...... 18.00 
47-26 SPIRAL HYGROMETER for readings of humidity of the air without reference to tables. Nickel- 
plated case............................................................................. 3.26 
47-40 DIRECT READING HUMIDITY APPARATUS (HYGROPHANT) for determining without com¬ 
putation both temperature and humidity of the air. Relative humidity or percentage of moisture 
is read directly from the cylinder noted between the two thermometers. This is a well-made instru¬ 
ment capable of highest degree of accuracy. With full and detailed directions for use............ 16.60 
47-66 RAIN GAUGE, United States Weather Bureau Type, 13 inches high, 3 inches diameter. With 
overflow and measuring stick............................................................. 
4.26
        

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