We also seek power to prescribe for the provision of thermometers and hygrometers in appropriate circumstances.
Paper acts in the same way, and a weighing hygrometer made of paper has been devised.
The hygrometer itself is extremely simple.
If the hygrometers are always kept under definite conditions, no error will be made, as all estimations will be comparable.
There was a significant negative correlation between fly and relative humidity, measured with a wet and dry bulb hygrometer in a screen in the open.
The hair hygrograph was inaccurate, but the graph was corrected from whirling hygrometer readings five times a day.
During weighing, which takes 10 seconds, the hygrometer hangs freely in the air.
A calibration curve may be obtained by plotting the weights of the paper hygrometer after exposure to air of various humidities.
