400 BOTANICAL GAZETTE [JUNE 
and sulphites on the other. The method of classification has been 
sufficiently outlined above to make it unnecessary to go into further 
detail here. It should be pointed out, however, that the proposed 
terminology could be extended to embrace many other physiological 
functions and reactions. It would be made to include the appear- 
ance and disappearance of methane, of hydrogen, of carbon monoxid, 
of sugars, amino-compounds, alcohols, organic acids, etc. Terms 
like dextro-propio or dextro-butyro should not be difficult to under-* 
stand, nor many other compound terms that will readily suggest 
themselves to the reader. 
The writer is aware of imperfections existing in the proposed 
grouping of some of the species; he feels, however, that in spite of 
these imperfections his suggestions deserve careful consideration 
at the hands of his colleagues. Should the present paper do no 
more than create a critical discussion of the existing terminology 
his work will not have been in vain.’ 
NEw JerseEY EXPERIMENT STATION 
New Brunswick, N.J. 
