Contents. 
v 
PAGE 
On the Reflexion-Caustics of Symmetrical Curves. By the Hon. 
Lord M‘Laren. (With Two Plates), .... 281 
Synthesis by means of Electrolysis. — Part III. Synthesis of 
; w-Dicarbodecahexanic Acid. By Prof. Crum Brown and Dr 
James Walker, . . . . . . 297 
Synthesis by means of Electrolysis. — Part IY. Synthesis of Suberic 
and %-Dicarbododecanic Acids. By Prof. Crum Brown and Dr 
James Walker, . . . . . . . 299 
Preliminary Experiment on the Thermal Conductivity of Alu- 
minium. By A. Crichton Mitchell, Esq., B.Sc., . . . 300 
Note on Electrolytic Conduction. By Robert L. Mond, Esq., B.A., . 302 
List of West Australian Birds, showing their Geographical Dis- 
tribution throughout Australia, including Tasmania. By A. J. 
Campbell, Esq., F.L.S. Communicated by Rev. James MacGregor, 
D.D., F.R.S. Edin. (With a Map), . . . . 304 
Pharmacology of Morphine and its Derivatives. - By D. B. Dott, 
Esq., F.C.S., F.I.C., and Ralph Stockman, M.D., Research Scholar 
of the British Medical Association, . . ~ . . .321 
A New Method for Determining Phosphorus in Organic Phos- 
phorus Compounds, By Prof. E. A. Letts and R. F. Blake, Esq., 
Queen's College, Belfast , ...... 382 
List of the Fossil Dipnoi and Ganoidei of Fife and the Lothians. 
By R. H. Traquair, M.D., F.R.S., ..... 385 
The Interactions of Circular and Longitudinal Magnetisations. By 
Prof. C. G. Knott, D. Sc., . 
. 401 
Closing Address. By the Hon. Lord M‘Laren, 
. 406 
Meetings of the Royal Society — Session 1889-90, 
. 411 
Donations to the Library, .... 
. 423 
Index, . . . . . . 
. 421 
Obituary Notices. (See separate Index), 
. 432 
