Vlll 
Contents. 
PAGE 
The Mechanism of the Separation of the Placenta and Membranes 
during Labour. By Dr Berry Hart, M.D., F.E.C.P.E. (Plates 
XVIIL, XIX.), 427 
The Pathology of Cystic Ovary. By J. W. Martin, M.D. Com- 
municated by Dr Woodhead, ..... 435 
Histological Observations on the Muscle Fibre and Connective 
Tissue of the Uterus during Pregnancy and the Puerperium. By 
T. A. Helme, Esq., M.B. Communicated by Dr Woodhead, . 435 
The Air in Coal-Mines. By T. G. Nasmyth, M.B., D.Sc., . . 435 
Obituary Notice of the late Robert Gray, Esq., Vice-President. By 
Dr R. H. Traquair, F.R.S., . . . . . 435 
On some Relations between Magnetism and Twist in Iron and Nickel. 
By Cargill G. Knott, D.Sc., ..... 435 
On the Fossil Plants in the Ravenhead Collection in the Liverpool 
Museum. By R. Kidston, Esq., ..... 436 
On the Action of Carbonic Acid Water on Olivine. By Alexander 
Johnstone, Esq., F.G.S., ...... 436 
Is the Law of Talbot true for very rapidly Intermittent Light? By 
George N. Stewart, Esq., . . . . . . 441 
On the Specific Gravity of the Water in the Firth of Forth and the 
Clyde Sea Area. By Hugh Robert Mill, D.Sc., Scottish Marine 
Station, ........ 465 
Arrested Twin Development. By Macdonald Brown, Esq., M.B., . 465 
On Numerical Solution of Equations in Variables of the nth Degree. 
By the Hon. Lord McLaren, ..... 467 
Alternants which are the constant Multiples of the Difference- 
Product of the Variables. By Prof. Anglin, M.A., LL.D., &c., . 468 
Chairman’s Closing Remarks, ...... 476 
The Theory of Determinants in the Historical Order of its Develop- 
ment. By Thomas Muir, M.A., LL.D., .... 481 
Donations to the Library, ...... 545 
Index, ......... 547 
