210 
gases, etc., may or may not be concerned. The disease may 
cause the death of the affected trees in a single season or it may 
require two or more seasons to accomplish its purpose 
A study of the disease seems to indicate that comparatively 
few trees have been killed and timber owners have no occasion 
for undue alarm, as in many cases the trees show a tendency to 
recover from the blight. There is at present no known reason 
for cutting healthy trees of young pine among which are scatter- 
ing trees affected by the leaf-blight. 
Dr. William W. Ford, of the Bacteriological Laboratory of 
Johns Hopkins University, delivered an address before a special 
meeting of the Boston Mycological rae June 14, 1909, on the 
distribution of poisons in mushrooms, which was printed in Sczence 
Dr. Ford has carefully eo and experimented 
with a number of species of mushrooms in recent years, and his 
conclusions, as La in this address, probably eek the most 
reliable hen on on this subject at the present 
eadly pees phallodes, with its several varieties, was 
ae 7 contain two poisons, one active in the raw plant only 
and the other resisting both cooking and digestion. Atropine is 
still considered a perfect antidote for muscarine, found in Amanita 
muscaria, but another poison may perhaps be present also in this 
species. 
Amanita rubescens and A. solitaria contain the same blood- 
destroying toxin found in uncooked plants of A. phalloides, but 
this is destroyed by heat. On the other hand, this poison is absent 
in A, eis hie A. chlorinosma, A. radicata and A. porphyria, 
and the y and resistant amanita-toxin is present in quantity. 
A, pee aee i not yet been proven ie which indicates 
that it is quite distinct from A. muscar? 
Russula emetica is mentioned as a ae irritant ; Helvella 
esculenta contains a poison similar to that found in uncooked A. 
phalloides ; certain phalloids of fetid odor are uniformly fatal to 
hogs; species of Volvaria are quéstionable ; and Boletus luridus 
Seely disturbs the system for a time, but has a very ob-. 
jectionable taste, which prevents it from Sine eaten in quantity. 
