218 PROCEEDINGS OF THE CANADIAN INSTITUTE. 
rious than day air. The influence of winds in greatly increasing 
the number of particles and germs in the air was also discussed and 
in this way, the writer explained, it was probable that the germs of 
malaria were laterally disseminated, and how they would tend so to 
increase each succeeding year as they found new centres of develop- 
ment. Hence it was apparent that forests, both mechanically, by 
breaking the force of winds, by keeping the air moist, by preventing 
extreme differences between day and night temperature, and by pre- 
venting undue drying out of the soil, would act favourably in pre- 
venting the wide-spread prevalence of malaria. 
Discussing the matter of the influence of cold in causing malaria, the 
writer gave a number of selected experiments concerning the rapid 
decrease of body temperature under different physical surroundings, 
as temperature, wind and moisture. 
He finally showed how drainage and the planting of forest trees 
would serve to lessen the conditions of soil favourable for the develop- 
ment of Bacillus Malarie, the assumed immediate cause of the 
’ disease. 
A discussion ensued in which Mr. W. Houston, Prof. J. P. 
McMurrich, Mr. Livingstone, Dr. Oldright, Mr. J. Notman, Dr. 
Bryce and the Chairman took part. 
SEVENTEENTH ORDINARY MEETING. 
The Seventeenth Ordinary Meeting of the Session 1883-84 
was held on Saturday, March 8th, the President in the chair. 
The minutes of last meeting were read and confirmed, 
The following list of donations and exchanges was read : 
Science Record, Vol. 2, No. 4. Feb. 15th, 1884. 
Science, Vol. 3, No. 56, Feb. 29th, 1884. 
The Canadian Practitioner for March, 1884. 
Journal of the Franklin Institute, for March, 1884. 
Journal of the Royal Microscopical Society, Series 2, Vol. 4, Part 1, for 
February, 1882. 
The Canadian Entomologist, Vol. 16, No. 1, January, 1884. 
Proceedings of the Royal Society of London, Vols. 31, 32, 33, 34, 35, and 
Part 1, Vol. 36, containing Nos. 206 to 228 inclusive, from March 
24th, 1881, to Nov. 30, 1883. 
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