Dr. 
KH 
coe 
Ait 
a 
oI 
o 
° 
— 
— 
w 
136 
Saturday, April 21—10 A.M. 
H. M. Ricwarps, Professor of Botany, Barnard College, 
Columbia University ; President of the Torrey Botanical 
Club, presiding. 
. Jounw M. Macrarvane, University of Pennsylvania: “The 
synchronism of plant structures.” (12 min. 
. G. FE. Sronr, Massachusetts Agricultural College: “Con- 
tact stimulation.” (15 min.) 
H. M. Ricwarps, Columbia University: “The respiratory 
ratio of cacti.” (12 min.) 
. R. H. True, Bureau of Plant Industry, U. S. Department 
of Agriculture: ‘The absorption of calcium. salts by 
squash seedlings.” (Read by title. ) 
. A. B. Stout, New York Botanical Garden: “ Duplication and 
cohesion in the main axis in Chicory.” (ro min.) 
W. W. Row tes, Cornell University: “The sequence of life 
in peat bogs.” (Read by title.) 
H. H. Yorr, Brown University: “Some observations on 
the sexuality of Spirogyra.” (10 min.) 
Haven Mercatr, Bureau of Plant Industry, U. S. Depart- 
ment of Agriculture: “ The problem of the imported plant 
disease as illustrated’ by the White Pine Blister Rust.” 
(Read by title.) 
H. H. Wuerzer, Cornell University : “ Outline of the history 
of the science of Phytopathology.” (15 min.) 
. F.C. Stewart, New York Agricultural Experiment Station: 
“Tubers within tubers of Solanum tuberosum.” (10 
min. ) 
. W. A. Murritt, New York Botanical Garden: “ The rosy- 
spored Agarics of North America.” (10 min.) 
Henry Kraemer, Philadelphia College of Pharmacy: “ Some 
botanical-pharmacognostical investigations.” (10 min.) 
E. W. Otte, Brooklyn Botanic Garden: “The cytological 
structure of Botryorhiza Hippocrateae.” (Read by title.) 
