ANNUAL REPORT. 
78 
November 16th.—Photographs of flowers and plants, illustrated bv 
the oxyhydrogen lantern : C. Pumphrey. 
November 30th.—Photo - micrography, illustrated by the oxy¬ 
hydrogen lantern : J. Edmonds. 
December 7th.—A ramble amongst the lichens on the island of 
Bute : W. H. Wilkinson. 
The following communication has been made to the 
Biological i* ection :— 
On the mechanical structure of the hart’s tongue fern (Scolopen- 
drium vulgare) : Professor W. Hillhouse, M.A. 
The following communications have been made to the 
Geological Section :— 
January 26th.—Fossil ornithology, with special reference to 
Arcluzopteryx lithographic , macrura: R. W. Chase. 
May 25th.—The quartzite pebbles of the Drift : A. T. Evans. 
July 27tli. — On granites: T. H. Waller, B. Sc. 
September 28tli.—On the geological specimens collected in the 
Shropshire excursion of the British Association: W. P. 
Marshall, M.I.C.E. 
October 10th.—On a rock from New Zealand, and the dust from the 
recent eruption there : T. H. Waller, B. Sc. 
November 23rd.—The modern theory of glacier motion : W. P. 
Marshall, M.I.C.E. 
The subjects of the meetings of the Sociological Section 
have been as follows :— 
I.—The Principles of Biology. 
January 21st.—Morphological differentiation in plants : Exposition 
by Professor Hillhouse, M.A., F.L.S. (concluded). 
March 18th.—Morphological differentiation of animals : Exposition 
bv Mr. F. J. Cullis, F.G.S. 
April 1st.—The vertebrate skeleton: Exposition by Mr. F. J. 
Cullis, F.G.S. 
May 6th.—The problems of physiology : Exposition by Mr. W. 
K. Parkes. 
May 20th.—Physiological integration in animals : Exposition by 
Professor Haycraft, M.B., F.R.S.E. 
July 1st.—The laws of multiplication of organisms : Exposition by 
Mr. W. B. Grove, B.A. 
October 7th.—The literature of Evolution published during the 
year: Address by Mr. W. R. Hughes, F.L.S. 
November 25th.—Genesis, development, expenditure, and nutrition : 
Exposition by Mr. W. R. Hughes, F.L.S. 
December 9th.—Special aspects of genesis: Exposition by 
Mr. F. J. Cullis, F.G.S. 
December 16th.—Multiplication of the human race, and human 
population in the future: Exposition by Dr. Alfred Hill, F.I.C. 
II. —The Studies in Sociology have been continued by Mr. A. Browett, 
Mr. W. H. France, Mrs. Browett, Mr. W. R. Hughes, F.L.S., 
Mr. F. J. Cullis, F.G.S., and Miss Naden. 
Biological Section, (President, W. P. Marshall, M.I.C.E.; 
Secretary, J. E. Bagnall, A.L.S.) —During the year 1886, 
eight meetings of this section were held, with an average 
