The formalin vapor will attack germs much more vigorously and certainly if it be mixed with water vapor, or steam; so it is usually best either to boil a large kettle of water in the room for half an hour or more, so as to fill the air with steam, before putting in the formalin, or to use a combination Evaporator with a lamp underneath it, which will give off both formalin and steam.
"A Handbook of Health"
Woods Hutchinson
S.C. Murray, General Counsel New York Central System La Salle Station Chicago, Illinois My dear Mr. Murray: I am sending you some maple molasses almost hot from the Evaporator.
"Epistles-from-Pap-Letters-from-the-man-known-as-The-Will-Rogers-of-Indiana"
Durham, Andrew Everett
The Head Examiner, without looking up or desisting from his rapid writing, began to express his deep regret that the author apparently preferred to work an Evaporator under a pressure instead of a vacuum.
"An Ocean Tramp"
William McFee