394 
Proceedings of the Royal Society of Edinburgh. [Sess. 
PROCEEDINGS OF THE ORDINARY MEETINGS, 
Session 1916-1917. 
FIRST ORDINARY MEETING. 
Monday , November 6, 1916. 
John Horne, Esq., LL.D. , F.R.S., F.G.S., President, in the Chair. 
The President opened the Session with a short Address on the Relation of Science to Industries 
and Education. 
The following Communication was read : — 
Experiments and Observations arising from a Consideration of Ligia oceanica (the common 
Slater). Parti. Immersion Experiments. Part II. Moulting of Isopods. By John Tait, M.D., 
I). Sc. Communicated by Sir E. A. Schafer. 
SECOND ORDINARY MEETING. 
Monday, November 20, 1916. 
John Horne, Esq., LL.D., F.R.S., F.G.S., President, in the Chair. 
At the Meeting of December 18 the following alterations in the Rules will be moved and 
seconded : — 
“In order to abolish the distinction between Resident and Non-Resident Fellows, the words 
‘Resident in Scotland’ in Rule YI shall be deleted, and Rule YII shall be wholly deleted. As 
a consequence the present Rules Nos. VIII-XXIX will become Nos. VII-XXVIII.” 
Mr J. H. R. Kemnal signed the Roll and was duly admitted a Fellow of the Society. 
The following Communications were read : — 
1. On the Adelphic Integral of the Differential Equations of Dynamics. By Professor E. T, 
Whittaker, F.R.S. 
2. A Special Table of Logarithms. By Frank Robbins. Communicated by the General 
Secretary. 
3. Sketch of a projected .new Branch of Biology : illustrated by Observations chiefly on 
Crustacea, (a) Limb Flexures and Limb Taxis in the Peracarida. ( b ) The Eyes of Glyptonotus. 
(c) Respiratory Arrangements in the Peracarida. ( d ) The Organ of Smell in Amphipods and 
Isopods. By John Tait, M.D., D.Sc. Communicated by Sir E. A. Schafer. 
THIRD ORDINARY MEETING. 
Monday , December 4, 1916. 
John Horne, Esq., LL.D., F.R.S., F.G.S. , President, in the Chair. 
At the Meeting of December 18 the following alterations in the Rules will be moved and 
seconded : — 
“In order to abolish the distinction between Resident and Non-Resident Fellows, the words 
‘Resident in Scotland’ in Rule VI shall be deleted, and Rule YII shall be wholly deleted. As 
a consequence the present Rules Nos. VIII-XXIX will become Nos. VII-XXVIII.” 
The following Communications were read : — 
1. The Gametophyte of Psilotum. By G. P. Darnell-Smith, B.Sc., F.I.C. Communicated 
by Professor F. 0. Bower, F. R.S. 
2. Transverse and Codirectional Induction Changes in Demagnetised Iron and Nickel in 
relation to the Molecular Theory of Magnetism. Part II. By James Russell. [With Lantern 
Illustrations. ) 
3. The Magnetic Test of Molecular Arrangement in Crystals : Magnetite and the a, P, y forms 
of Iron. By Professor W. Peddie, D.Sc. 
