1893.] Microscopy. 1027 
tage of this method is that the preparations were permanent—in fact 
they become better with age instead of degenerating. All the prepa- 
rations from which the figures were drawn are still in existence and 
can be consulted at any time. 
I have employed this method with almost as good results in the 
preparation of surface views of the embryo chick and English sparrow 
and also; with considerable success on other molluscan eggs and 
embryos as well as those of annelids and echinoderms. 
—E. G. Conxuin, Delaware, Ohio. 
