CONTENTS. 
Election of Office-Bearers at the General Statutory Meeting, Monday, 
Nov. 24, 1890, ....... 
Chairman’s Opening Address, ..... 
On the Occurrence of Sulphur in Marine Muds and Nodules, and 
its hearing on their Mode of Formation. By J. Y. Buchanan, 
F.R.S., ........ 
On a Simple Pocket Dust-Counter. By John Aitken, F.R.S. 
(With a Plate), ....... 
On the Action of Metallic (and other) Salts on Carbonate of Lime. 
By Robert Irvine, F.C.S., and W. S. Anderson, . 
Manganese Deposits in Marine Muds. By Robert Irvine, F.C.S., 
and John Gibson, Ph.D., .... 
On a Difference between the Diurnal Barometric Curves at Green- 
wich and at Kew. By Alexander Buchan, LL.D., 
Barographic Record in the Vicinity of a Tornado. By John 
Anderson. Communicated by Dr Buchan. (With a Plate), 
Note on Potassium Persulphate. By Hugh Marshall, D.Sc., 
On the Soaring of Birds : being a Communication from Mr R. E. 
Froude in continuation of the Extract from a Letter by the late 
Mr William Froude to Sir William Thomson, published in these 
“ Proceedings,” Match 19, 1888, . 
On some hitherto unproved Theorems in Determinants. By 
Thomas Muir, LL.D., ...... 
rjpn yn 
Equation of the Glissette of the Two-term Oval — +r^=l, and 
Cognate Curves. By the Hon. Lord McLaren, . 
The Influence of High Winds on the Barometer at the Ben Nevis 
Observatory. By Alexander Buchan, LL.D., 
Electrolytic Synthesis of Dibasic Acids. Alkyl Derivatives of 
Succinic Acid. By Professor Crum Brown and Dr James 
Walker, ........ 
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