Note on a Singular Passage, in the Principia. By Prof. Tait, 
The Graphic Analysis' of the Kinematics of Rigid-Bar 
Mechanisms. By Professor R. Smith. Communicated 
by Professor Tait, . . 
Note on the Necessity for a Condensation-Nucleus. By 
Professor Tait, ; - . 
Monday f 2nd February 1885. 
President’s Address, . 
On Evaporation and Condensation. By Professor Tait, 
Note on Ectocarpus. By John Rattray, B.Sc. Com- 
municated by John Murray, Esq., 
Some remarkable Concretions, collected near Philadelphia by 
the Rev. J. M. Macdonald, were exhibited, 
Monday , \Uh February 1885. 
Preliminary Report on the Cephalopoda collected during the 
Cruise of H.M.S. “Challenger.” Part I. The Octo- 
poda. By William E. Hoyle, M.A. (Oxon.), M.R.C.S., 
On Energy in Vortex Motion. By Sir William Thomson, 
The Theory of Determinants in the Historical Order of its 
Development Part I. Determinants in General 
(1693-1800). By Dr Thomas Muir, 
On Bipartite Functions. By Dr Thomas Muir, 
Note on Galois’ Theorem regarding the continued fraction 
Representation of the Roots of an Equation. By Dr 
Thomas Muir, . 
letter from Professor Michie Smith on the Zodiacal Light* 
and on the Origin of Atmospheric Electricity, . 
On a New Form of Chromotrope. By John Aitken, Esq.,* 
On an Application of the Atmometer. By Professor Tait,’. 
Monday , 2nd March 1885. 
An Address on the Recent Progress of the Geological Survey 
of the United Kingdom was given by Professor Geikie, 
Monday, \Uh March 1885. 
PAGE 
72 
78 
78 
80 
91 I 
94 
94 
94 
114 
114 
114 
114 
114 
116 
116 
117 
Hooke’s Anticipation of the Kinetic Theory and of Syn- 
chronism. By Professor Tait, 
On the Hexagonal System in Crystallography. By Professor 
Crum Brown, . 
On the Effect of Temperature on the Compressibility of 
Water. By Professor Tait, .... 
Chemico-Physiological Investigations on the Cephalopod 
Liver, and its identity as a true Pancreas. By Dr A B 
Griffiths, Ph.D., E.C.S. (Bond, and Paris). Com- 
municated by W. E. Hoyle, Esq., M.A., 
Chromomictors. By Mr John Aitken, 
On Chlorophyll from the Deep Sea. By W. W. Hartley* 
E.R.S., Royal College of Science, Dublin, 
On the Termite as the Tropical Analogue of the Earth Worm. 
By Professor Henry Drummond, 
On Peroxides of Zinc, Cadmium, Magnesium, and Alumin- 
By J. Gibson, Ph.D., and[R. M. Morrison, D.Sc., 
mm. 
118 
118 
120 
120 
122 
130 
137 
146 
( For continuation of Contents , see pp . 3 and 4 of Cover .) 
