1896-97.] 
Meetings of the Society. 
515 
2. Note on an Analysis of Human Gastric Juice. By W. R. Lang, 
B.Sc. Communicated by Professor M‘Kendrick, F.R.S. p. 298. 
3. On the Structure and Origin of Coral Reefs, Part I. By Dr John 
Murray. 
4. A New Form of Constant Volume Air Thermometer, which shows 
the Total Pressure directly, and may be graduated in degrees by 
Temperature. By Mr J. R. Erskine-Murray. pp. 299-302. 
The Very Rev. Principal Caird, Professor George Darwin, and Sir 
William Flower, K.C.B., were, on the proposal of the Council, 
balloted for and declared duly elected as British Honorary Fellows 
of the Society. 
NINTH ORDINARY MEETING. 
Monday , bth April 1897. 
Professor M ‘Kendrick, Vice-President, in the Chair. 
The following Communications were read : — 
1. On Electrical Properties of Fumes proceeding from Flames and 
burning Charcoal. By the Right Hon. Lord Kelvin and Dr Magnus 
Maclean, pp. 313-322. 
2. The Automorphic Linear Transformation of a Quadric. By Di- 
Thomas Muir. Trans, xxxix. pp. 209-230. 
3. On Ethane prepared from Ethyl-Iodide, and on the Properties of 
some mixtures of Ethane and Butane. By Professor J. P. Kuenen. 
pp. 433-442. 
4. Continuation of Experiments on Electric Properties of Uranium. 
By the Right Hon. Lord Kelvin, Dr J. Carruthers Beattie, and Dr 
M. Smoluchowski de Smolan. pp. 417-428. 
5. Our Perception of the Direction of Sound. By Albert A. Gray, 
M.D. Communicated by Professor MKendrick. pp. 443-452. 
6. On the General p, v, t Equation. By Professor Tait. 
7. Note on the Reducing Power of the Living Animal Tissues. By 
David Fraser Harris, M.B., B.Sc. pp. 383, 384. 
8. Haematoporphyrinuria, and its Relations to the Origin of Urobilin. 
By the Same. pp. 385-390. 
9. The Diurnal Variation in the Frequency of Storms on Ben Nevis 
Observatory during the 13 years 1894-86. By Mr A. Rankin. Com- 
municated by Dr Buchan. 
TENTH ORDINARY MEETING. 
Monday , 3 rd May 1897. 
Professor Chrystal, Vice-President, in the Chair. 
The following Communications were read : — 
1. Dschabir Ben Hayyan and the Chemical Writings ascribed to him. 
By Professor John Ferguson. 
