If your machine is in a warm, dry room, heated by a fire, far more evaporating surface will be required than in a cool, dry cellar, for the reason that water vaporizes just in proportion to its heat; and as the circulating pipes upon which the water-pans rest must necessarily be much warmer in a cold room than in a warm one, of course more surface must be exposed in a warm than in a cold one.
"Natural and Artificial Duck Culture"
James Rankin
Even then it is liable to contain traces of ammonia, or some other substance which vaporizes at a lower temperature than water.
"An Introduction to Chemical Science"
R.P. Williams
Heat vaporizes the As2O;3. Explain the chemical action.
"An Introduction to Chemical Science"
R.P. Williams