A SCRIBOFACILOGRAPH FOR LABELING KYMOGRA- 
PHIC TRACINGS 
T. L. PATTERSON 
The ordinary laboratory routine of labeling kymographic trac- 
ings involves at best a rather tedious and arduous task which 
consists either of holding the hand unsupported well above the 
carbonized paper and writing upon it with a stylus in the form 
of some pointed instrument, or writing over the rod of an iron 
stand or some other inconvenient support for the hand. Fur- 
thermore, the carbonized paper must be securely held and es- 
pecially where there are drafts of air while the labeling is being 
done, and as a result the fingers become coated with carbon, so 
that notebooks, clothing, etc., which are handled or touched di- 
rectly thereafter may become badly smeared and blackened with 
carbon. 
The apparatus herein described is easily made and consists 
of a frame constructed’ of hard wood to give it weight, the strips 
of which are 3/4 inch by 7/16 inch which are joined together 
like a picture frame. The size of the frame is 12 inches by 
7 3/8 inches and upon it rests an automatic slider or hand rest, 
11/2 inches in width by 7 3/8 inches in length by 3/8 inch in 
thickness, the ends of which are so cut that 2/8 of the- 3/8 inch 
thickness drops between the two sides of the frame while the 
remaining 1/8 inch of thickness overlaps the upper surfaces of 
the frame itself. This is held in place by small curved wires, 
one of which is introduced into each end of the under cut sur- 
face of the slider, these wires then fitting into a groove of suit- 
able size on the inner surfaces of the long sides of the frame 
so that the slider may easily be pushed from end to end. The 
frame is so constructed, therefore, that it spans the carbonized 
paper, thus being elevated slightly from it by four short feet 
made of brass headed tacks which are driven into the under side 
of the frame about 2 inches from the ends respectively and pro- 
jecting about 5/16 of an inch. The brass feet rest upon the 
edges of the paper thus holding it firm while the labeling is 
being done. Although this apparatus was devised especially for 
labeling kymographic tracings it is equally valuable for drawing 
