228 BOTANICAL GAZETTE. ; [Sept., 
can reproduce accurately for class illustration any published 
figure, and with great economy of time and money. : 
Professor Burrill stated that he had made lantern slides from 
blackboard drawings. By making the chalk lines even and dense 
a photograph can be taken with very good effect. 
Professor Barnes upon inquiry brought out the fact that the 
scratches upon the gelatin appear as black as ink lines against 
a white surface. : 
Dr. N. L. Britton read a paper upon the herbaria of Colum- 
bia College. The description of the herbarium cases caused con- 
siderable discussion, by Professors Pillsbury, Britton, Beal, Barnes, 
Sargent, etc. 
Prof. Barnes thought that the most commendatory conven- 
lence spoken of was the tightly fitting glass doors. 
n the discussion with reference to dust-proof devices, it was 
generally the opinion that a working herbarium can not be made 
dust proof, as the doors are of necessity open so much of the time, 
and the only way to keep the specimens in proper condition is to 
exercise “eternal vigilance.” 
Dr. N. L. Britton read a paper upon Anychia dichotoma, of 
which he discriminated two forms, which might possibly merit 
specific rank, 
Turspay, August 24,9 a.at. Professor E. W. Claypole read 
a paper upon the appearance of immigrant plants in the neigh- 
borhood of Akron, Ohio, which was discussed by Messrs. Morong 
and Coville. 
Professor F'. L, Scribner then presented a paper upon the 
botanical character of the black rot of the grape. 
e following resolutions were then adopted : 
ey are gratified with the beginning made, they express the hope that this 
work will be still further supported. The botanists here assembled hereby re- 
new their promise to render the U. S. Commissioner of Agriculture any assist- 
ance in their power toward making investigations in any department of botany. 
Resolved, That the hearty thanks of the Botanical Club of the A. A. A. S- 
The presiding officer tendered the thanks of the club to Dr- 
