48 The Botanical Gazette. [January, 
thickness of the petiole of Richardia, by Katherine E. Golden; The 
effects of light on the germinating spores of marine algae, by. M.A 
Brannon; Notes on Saprolegnia, by Geo. L. Roberts; Contribution to 
the life history of Notothylas, by D. M. Mottier; Notes on evolu: 
tion in the cacti, by J. M. Coulter; The ash of trees, Notes on the bio- 
logical survey, and The stomates of Cycas, by M. B. Thomas; Poison- 
ous influence of Cypripedium spectabile, Symbiosis in Isopyrum bi- 
ternatum, and Work of the botanical division of the Natural History 
Survey of Minnesota, by D.T. MacDougal; Notes on sectioning woody 
tissues, Concerning the effect of glycerin on plants, and Notes on an 
imbedding material, by John S. Wright; and The adventitious plants of 
Fayette county, by Robert Hessler. Beside the above the presiden- 
Reg on by J. C. Arthur was a botanical theme. The special senses 
plants. 
Dr. SCHENCK recommends‘ a method of preparing unusually 
large and thick sections for permanent. preservation so as to be useful 
for lecture demonstrations and for. examination with the magnifier. 
IMMEDIATELY FOLLOWING the World’s Congress on Horticulture # 
Chicago in August last, a series of meetings was held to consider t 
advisability of organizing a horticultural society which shall include 
every country of the globe. After much discussion, in which mail 
eminent men from various parts of the world engaged, the Worlds 
upon which occasions, also, it can greatly aid in procuring exhi fe 
from all parts of the world. ee 
‘Bot. Cent. 54: 1. April 1893. 
