216 PROCEEDINGS OF THE CANADIAN INSTITUTE. 
The following members took part in the discussion which 
followed: The President, Dr. Barclay, Dr. Jos. Workman, 
Dr. O’Reilly, Mr. John Notman and Mr. David Boyle. 
SIXTEENTH ORDINARY MEETING. 
The Sixteenth Ordinary Meeting of the Session 1883-84 
was held on Saturday, March Ist, 1884, the Third Vice- 
President, Dr. Geo. Kennedy, in the chair. 
The minutes of last meeting were read and confirmed. 
The following list of donations and exchanges was read : 
Science, Vol. 3, No. 55, for Feb. 22nd, 1884. 
Memoirs of the Boston Society of Natural History, Vol. 3, No. 8, on the 
development of (icanthus Niveus and its Parasite, Teleas, by 
Howard Ayres. 
3. Harvard University Bulletin, Vol. 3, No. 4, for January, 1884. 
4. Historical Collections of the Essex Institute. Vol. 20, Nos. 10, 11, 12, for 
Oct., Nov. and Dec., 1883. 
Bel) 
Dr. P. H. Bryce read a paper entitled, “Some Factors in 
the Malaria Problem.” 
The reader of the paper explained that he proposed reading ex- 
tracts of a Report made upon malaria, prevalent in the lower dis- 
trict of the Grand River, under the direction of the Provincial Board 
of Health in September last. 
After stating briefly the characters of the district regarding the 
nature of the soil and the underlying geological formations, in which 
he stated that coniferous strata are overlaid by Erie clays, and that 
the Saugeen clays overlie these, Dr. Bryce went on to explain how 
that, since the time of the building of the dams on the river for the 
purpose of supplying water by a feeder to the Welland Canal, 
malaria had been very prevalent up to the present. This he 
showed by the statements of old settlers and medical men, regarding 
that in past years, and by the tabulated reports of disease made by 
medical correspondents of the Board during the last year. After 
explaining the results upon the low-lying flats along the river of the 
damming back of the waters, the writer stated that there were three 
distinct elements of the problem, namely, theconditions of the soil, the 
ground-water and the air. Assuming that the various causes which it 
