406 
Fic. 4. Greatly enlarged view of the central portion of Fig. 2, showing dark spaces 
within the membrane between the dividing chromatophores; this part of the mem- 
brane is becoming double. 
Fic. 5. Protoplasmic threads in the leaf-cells of Astrophyllum sylvaticum. 
Fic. 6. Dividing chromatophores of Ageratum conyzoides, showing the pitted 
surface, the laterally projecting ridges (in optical section) and the central spaces be- 
tween the dividing chromatephores. Diagram, 
; Fic. 7. Leaf-cell of Astrophyl/um, showing nucleus, chromatophores and proto- 
plasmic threads. 
Fic. 8. Transverse vertical section of leaf-cells of Astrophyllum, showing chro- 
matophores, nucleus and protoplasmic threads. - 
Proceedings of the Botanical Club, A. A. A. S, Brooklyn Meeting, 
August 15-22, 1894, : 
The meetings were held in the Packer Institute. 
Frrpay Morninc, AuGUST 17TH. 
The meeting was called to order by Professor N. L. Britton, ie 
and in the absence of the President, Prof. D. H. Campbell, Prof. on 
Geo. F. Atkinson was elected to the office of President. _ 
Prof. F. C. Newcombe was elected to the Secretary's office in 
the absence of Mr. W. T. Swingle. | | 
The report of the Secretary was.read, showing for the year end- “oe 
ing Aug. 14, 1894, receipts to the amount of $8,.and an equal 
amount of disbursements. The report was accepted. . Voluntary 
contributions to the amount of $7.32 were made by those present. i 
Prof. C. E. Bessey then gave some notes’ on the Be 
nation of macrospores of Marsilia vestita.. These were germina — : 
in. water, forming larger_prothallia with. rhizoids than are us 
present in this genus. ae en 
Dr. Erwin F. Smith recommended ‘the preliminary treatmen af : 
of vegetable sections with tannin solution, in order by subsequent | 
staining to differentiate micro-organisms present in the tissues 
Prof. F. C. Newcombe also spoke favorably of tannin solutio® 
as aiding in the differentiation of protoplasmic structure by a ; 
quent staining. : ee 
_ Dr. W. J. Beal showed how measurements of parts may Ae 
ee helpful in the identification of grasses. Laas 
4 
