CHAS. LENTZ & SONS 
A solution of formaldehyde and lo per cent, of glycerin 
is placed in the retort and the burner ignited. The formalde- 
hyde gas is then liberated through the keyhole in great volume. 
Portable, strong'^ dwrable and absolutely effective. Used 
by nearly every hospital in Philadelphia, and by numbers 
of other hospitals, Boards of Health and Physicians, - 
throughout the United States. Every disinfector has given 
perfect satisfaction. Used with success by the United States 
War Department, Philadelphia and Washington Boards of 
Health, etc. Price $12 OO 
Weight of complete apparatus, empty 6 pounds. 
Weight of complete apparatus, filled lo pounds. 
Capacity of retort 4 pinls. 
Apparatus is constructed entirely of copper and brass. 
We have received testimonials with reference to the practical work done with 
this disinfector from many eminent men of authority, including Dr. Geo. M. 
Sternberg, Surgeon-General United States War Department. 
[Copy] War Department, Surgeon-General's Office, 
Washington, December 10, 1898. 
Messrs. Chas. Lentz & Son, 
18 and 20 North Eleventh Street, Philadelphia, .Pa. 
Gentlemen : — Referring to your letter of December 5th, asking in regard to 
formaldehyde gas generator left by you for experiment, the Surgeon-General 
directs me to say that the officer reports very favorably upon its action upon the 
bacillus of typhoid fever and of diphtheria, and that the apparatus is easily man- 
aged and quite portable. Several have already been purchased of you. 
Very respectfully, 
(Signed) C. H. Alden, 
Assistant Surgeon- Ge?ieral, U. S. Army. 
New York Board of Health, March 20, 1899. 
"I like the ease and rapidity with which disinfection can be carried out 
with it." 
Wm. H. Park. 
Saranac Lake Board of Health, January 27, 1899. 
"The apparatus has given entire satisfaction and enabled me to disinfect sev- 
eral entire cottages with facility, which I was never able to do in a satisfactory 
manner before receiving your device." 
E. S. McClellan. 
Complete descriptive pamphlet will be mailed on application. 
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