OFFICIALLY ADOPTED BY THE UNITED STATES ARMY 
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The McCall Incinerators, as in use at the Jamestown Exposition 
MCCALL INCINERATOR 
JAMES H. MCCALL 
PATENTEE, OWNER AND MANUFACTURER 
HUNTINGDON, TENN., U. S. A. July 31, 1 - • • 
Haj. Edgar A. Hearns, 
Medical Corps, Fort Totten, N. 
Dear Sir: , . 
I have the honor to report that I have made a very im¬ 
portant improverent in the construction of the McCall Incinera¬ 
tor. Thi 3 improvement consists of a sheet steel fire box 
which is lined with a fire proof material, thu3 obviating the 
use of brick and the necessity of employing skilled labor in 
setting up the machines, thereby reducing, to a considerable 
extent, the cost of installation. 
The McCall Incinerator originally had this sheet steel lire 
box, but for camps of more or less permanency brick wore found 
to be more desirable. The only objection to the sheet steel fire 
box was that it would warp under intense heat, but in the im¬ 
proved pattern this is obviatod by the use of an asbestos lining. 
With this improvement the machine can oe installod in aoout 
one-third of the time required when brick are used, and, in my 
opinion, will be practicable for use with moving troops, as thej 
can be readily loaded on an escort wagon, ambulance or other 
transportation. ... , 
Tho fire box is constructed so the superstrue sure will se» 
upon it without alteration of the other parts of the incinera¬ 
tors. Therefore all of the incinerators now in uso by the 
Government (about 500) can be converted into mobile machines by _ 
supplying two fire boxes for each machine, which can oe furmsnea 
at a nominal cost. 
The use of brick is all right for permanent car.p>s, target 
ranges, etc., but I am quite sure the sheet steel fire oox will 
be preferable for maneuver camp3, or moving troops. 
* A demonstration of the advantages of this improvement will 
be made at the Maneuver Camp, Fort Benjamin Harrison, Indiana 
in September next. 
