IV 
Note on Professor Bain’s Theory of Euclid I. 4. By Wm. 
Bobertson Smith, M.A., Assistant to the Professor of 
Natural Philosophy. Communicated by Professor Tait, 
A Simple Mode of Approximating to the Wave-Length of 
Light. By W. Leitch, Assistant to the Professor of 
Natural Philosophy in the University of Glasgow. 
Communicated by Professor Tait, 
Note on Linear Partial Differential Equations. By Professor 
Tait 
X1A X i • • • • • » • 
On the Oxidation Products of Picoline. By James Dewar, 
F.R.S.E., Lecturer on Chemistry, Yeterinary College, 
Edinburgh, ...... 
Notes of some Experiments on the Bate of Plow of Blood 
and some other Liquids through tubes of narrow 
diameter. By J. Matthews Duncan, M.D., F.R.S.E., 
and Arthur Gamgee, M.D., F.R.S.E., 
On Cystine (C 3 H 7 N0 2 S). By James Dewar, F.B.S.E., 
Lecturer on Chemistry, Yeterinary College, Edinburgh, 
and Arthur G-amgee, M.D., F.B.S.E., Lecturer on 
Physiology, at Surgeon’s Hall, Edinburgh, 
Notes from the Physical Laboratory of the University. By 
Professor Tait. (With a Plate), 
Donations to the Society, . 
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