532 Richards. — The Respiration of 
writer. Since his first paper 1 Bohm has published a short 
note, in which he gives, as the most probable explanation 
of the increased respiration, a traumatic action of the wound 
itself not depending upon the action of the atmospheric 
oxygen on the tissue exposed by wounding. To arrive, if 
possible, at some definite conclusion regarding these points 
was the object of this research. The work was undertaken at 
the suggestion and under the direction of Prof. Pfeffer, to 
whom the writer’s best thanks are due for his advice, and for 
the opportunities offered for carrying on the research. 
After a preamble concerning the methods employed and 
the apparatus used, there is a discussion of the various experi- 
ments, after which follows a record of the experiments in 
tabular form. The latter are referred to in the text by 
number or letter. 
Apparatus and Methods. 
By far the larger amount of the work was done with the 
Pfeffer-Pettenkofer apparatus for determining the respiration 
of plants, and with a modified form of Stich’s apparatus for 
finding the 
C0 2 
O, 
- equation. A few experiments were also 
made to obtain some idea of the amount of C0 2 contained in 
living tissues, which will be mentioned in passing. 
A Pettenkofer apparatus of the form as improved by Pfeffer 2 
was employed ; the apparatus is so well known that it is 
unnecessary to dwell on it, and in the reference given a full de- 
scription of it will be found. It is also scarcely necessary to 
rehearse the sources of error to be avoided and the various 
precautions which must be taken to ensure accuracy, as all of 
these have been described with care by earlier writers. It 
suffices to say that every care was taken to observe the neces- 
sary precautions ; that the apparatus was tested from time to 
time to make sure that there were no leaks ; that the KOH 
1 Bot. Centralblatt, Vol. 1 , p. 200, 1892. 
3 Ueber intramolekulare Athmung : Untersuch. aus dem Bot. Inst, zu Tiibingen, 
I. 636. 
