2 94 
unable in Pe places to stand the cold, and gave clear indi- 
cations of fros 
During ee i ae the Hemlock Forest was the warmest 
part of the Park, the temperature there at the same time being 31, 
Grorce V. Nasu 
NOTES, NEWS AND COMMENT. 
The following eis have been pee before the weekly 
convention at the museum: Mycorhizas of J/onotropa, by Dr. 
D. T. MacDougal ; Vegeta Reproduction of the Hepaticae, es 
Dr. M. A. Howe; Genus Lycopodium, by Professor F. E. Lloy 
Plant Diseases of Nae rk, by Mr. F. H., Blodgett; Effect a 
Low Temperatures u the Grow! th of Stertgmatocystis nigra, 
by Miss Ada Watterson ; Physiological Role of Mineral Nutrients, 
b cDougal ; Spore Development in Fungi, 
C. C. Curtis; Confervae, by Mr. Tracy Haze Vhat a Botanist 
rs of Certain Grasses, r. 
Viburnum, by Miss Nellie Hewins ; Substances Isolated from 
oanuts, by Mr. R. E. Kirkwood 
Dr. W. Johannsen, of Copenhagen, has developed the practical 
application of his discoveries of the influence of sulphuric ether 
resting period and placed in tight chambers in which an amount 
of ether equal to 25 to 60 © parts to uae ees) parts of en- 
plants are removed to the forcing house. Successful results have 
been attained with Syringa, Cytisus, Asalea, Viburnum, Amyg- 
dalaceae, Spiraca, Pyrus, Staphylea, He, Convallaria, and 
tulips. 
