206 Proceedings of the Koyal Society of Edinburgh. [Sess. 
The Neill Prize for the Biennial Period 1917-1919 was awarded to Professor John Tait (and 
received on his behalf by Dr Bowie') for his work on Crustacea. His first observations, twelve years 
ago, were upon the coagulation of the blood of Lygia and Gammarus, but from these he was led to 
study other aspects of the physiology and also the morphology of certain Crustacea. Five papers 
of this nature were published in the Proceedings of the Society in 1917. Of these the most note- 
worthy is an account of the structural features of Glyptonotus, based on the rich material collected 
by the Scottish National Antarctic Expedition, now in the Scottish Oceanographical Laboratory. 
Special mention should be made of two papers published by Professor Tait in the Quarterly 
Journal of Experimental Physiology in 1918. One of these, written in collaboration with 
Dr J. A. Gunn, is devoted to a study of the blood of the Crayfish, and contains a detailed 
account of the structure and physiology of the blood-corpuscles — three types of which are 
carefully described. Dr W. B. Hardy showed in 1892 that coagulation of the blood of the 
Crayfish follows cytolysis of certain corpuscles which he termed “ explosive corpuscles.” Drs Tait 
and Gunn found that another type of blood-corpuscle — which they termed a tbigmocyte — also under- 
goes cytolysis, and thus an explanation was afforded of the fact already known that there are two 
successive coagulations separated by an interval of time. The other paper by Professor Tait 
is devoted to the consideration of phagocytosis, amoeboid movement, and a number of related 
problems of great general interest, and this paper also is marked by the same combination of careful 
observation and suggestive interpretation. 
The following communications were submitted : — 
1. Petrography of the Intrusive Igneous Rocks in the neighbourhood of Dundee. By David 
Balsillie, F.G.S. Trans. 
2. An Identical Relation connecting Seven Vectors. By Mr F. L. Hitchcock. Communicated 
by The General Secretary. Proc., vol. xl, pp. 129-139. 
Dr J. C. Lamont and Professor Stephenson (elected 1912) signed the Roll and were duly 
admitted as Fellows. 
NINTH ORDINARY MEETING. 
Monday , June 21, 1920. 
Professor Frederick 0. Bower, M.A., D.Sc., LL. D., F. R.S. , F.L.S., President, in the Chair. 
The Ballot for the election of Honorary Fellows was taken, Mr W. A. Tait and Dr A. Crichton 
Mitchell being nominated as Scrutineers of the Ballot. After announcement by the Scrutineers 
the Chairman declared that the following had been elected Foreign Honorary Fellows : — 
William Wallace Campbell, Director of the Lick Observatory. 
Yves Del age, Professor of Zoology, Faculty of Sciences, Paris. 
Hendrik Anton Lorentz, Professor of Physics, Leiden University. 
Alfred Gabriel Nathorst, Stockholm. 
Ch. Emile Picard, Perpetual Secretary . Academy of Sciences, Paris. 
Charles Richet, Professor of Physiology, Faculty of Medicine, Paris. 
Georg Ossian Sars, formerly Professor of Zoology, Christiania, and Director of Norwegian 
Fisheries. 
The following Communications were submitted : — 
1. Obituary Notice of Sir John Jackson, Kt., LL.D, By D. A. Stevenson, B.Sc., M.Inst.C.E. 
Proc., vol. xl, pp. 182-184. 
2. The Harmala Alkaloids in Malaria. By Professor J. A. Gunn, D.Sc., and Lieut. -Col. D. G. 
Marshall, M.B. Proc., vol. xl, pp. 140-149. 
3. The Musical Scale. By Mr Joseph Goold, Nottingham. Communicated by Mr C. R. 
Gibson. Proc., vol. xl, pp. 161-171. 
4. The Explanation of an Apparent Anomaly in the Results of Measurement of Dissociation 
Pressures. By Professor A. W. C. Menzies, M.A., B.Sc. Proc., vol. xl, pp. 158-160. 
5. A Law of Force giving Stability to the Rutherford Atom. By John Marshall, M.A., B.Sc. 
Proc., vol. xl, pp. 150-157. 
