Hence 
of Edinburgh, Session 1866-67. 
125 
x y z 
x \ Vi H 
X 2 V-i Z '2 
But it is at once seen that 
Y Z 
Y Z 
Y, Z, 
= *, V 
T, Z. 
= as.. 
x y z 
x i Vi *1 
X 2 V-2 z 2 
Hence 
V = 
x y z 
H y x z x 
x 2 y-2 Z 2 
Q. E. D. 
The following Gentleman was elected a Fellow of the 
Society 
James H. B. Hallen, Esq. 
The following Donations to the Library were announced:— 
Transactions of the Highland and Agricultural Society of Scotland. 
Yol. I. No. 2. Aberdeen, 1867. 8vo.— From the Society. 
Transactions of the Royal Society of Literature, London. Yol. VIII. 
Part 3. 8 vo. — From the Society. 
Journal of the Scottish Meteorological Society for January 1867. 
Edinburgh, 8vo. — From the Society. 
Journal of the Chemical Society of London for March 1867. 8vo. 
— From the Society. 
Proceedings of the Meteorological Society of London. Yol. III. 
No. 27. 8 vo. — From the Society. 
Proceedings of the Royal Horticultural Society of London. Yol. I. 
New Series, No. 7. 8vo.— From the Society. 
Monthly Notices of the Royal Astronomical Society, London. 
Yol. XXVII. No. 4. 8vo.—~ From the Society. 
Proceedings of the Royal Geographical Society, London. Yol. XI. 
No. 1. 8vo. — From the Society. 
Proceedings of the Royal Society, London. Vol. XV. No. 90. 
8vo. — From the Society. 
Proceedings of the Royal Medical and Chirurgical Society of Lon- 
don. Yol. Y. No. 6. 8vo. — From the Society . 
