Contents. 
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PAGE 
On a new Entozoon (Pentastomum protelis) from the Mesentery of 
Proteles cristatus, Sparrmann. By W. E. Hoyle, M.A. (Oxon.), 
F.R.S.E., Naturalist to the “ Challenger” Expedition Commission, 219 
Bright Clouds on a Dark Night Sky. By the Astronomer-Boyal for 
Scotland, ........ 223 
Mathematical Note. By Mr A. H. Anglin, .... 223 
Note on the Compressibility of Water, Sea- Water, and Alcohol, at 
High Pressures. By Professor Tait, .... 223 
Note on the little b group of lines in the Solar Spectrum and the new 
College Spectroscope. By the A.stronomer-Koyal for Scotland, . 225 
On Superposed Magnetisms in Iron and Nickel. By Prof. C. G. 
Knott, D.Sc., . . . . V . . 225 
Further Note on the Maximum Density-Point of Water. By Prof. 
Tait, 226 
On Surface Emissivity. By Professor Tait, . . . . 230 
On a proposed Edinburgh Marine Station for Biological Research at 
Granton Quarry. By Mr J ohn Murray, . . . .231 
On Work done on board H.M.S. ‘‘Triton” in the Faroe Channel 
during the Summer of 1882. By Mr John ]\[urray, . . 231 
On the Pennatulida dredged in the Faroe Channel during the Cruise 
of H.M.S. “ Triton” in August 1882. By Prof. A. M. Marshall. 
Communicated by Mr John Murray, . . . .231 
On the Asteroidea dredged in the Faroe Channel during the Cruise 
of H.M.S. “ Triton” in August 1882. By Mr W. Percy Sladen, 
F.L.S., F.G.S. Communicated by Mr John Murray, . . 231 
On the Pycnogonida dredged in the Faroe Channel during the Cruise 
of H.M.S. “ Triton” in August 1882. By Dr P. P. C. Hoek. 
Communicated by Mr John Murray, .... 231 
On the Crustacea dredged in the Faroe Channel during the Cruise of 
H.M.S. “ Triton” in 1882. By Rev. A. M. Norman, D.C.L. 
Communicated by Mr John Murray, . . . .231 
On the Tunica ta dredged in the Faroe Channel during the Cruise of 
H.M.S. “ Triton” in August 1882. By Professor W. A. Herdman, 231 
On the Proofs of Proportionality of Emissive and Absorptive Power. 
By Professor Tait, . . . . . . .231 
A Contribution to the Chemistry of Nitroglycerine. By Matthew 
Hay, M.D., Assistant to the Professor of Materia Medica in the 
University of Edinburgh. Communicated by Prof. Crum Brown, 234 
The Elementary Composition of Nitroglycerine. By Matthew Hay, 
M.D., and Orme Mason, M.A., B.Sc. Communicated by Prof, 
Crum Brown, ....... 234 
President’s Closing Remarks, ...... 235 
Mathematical Note. By Mr R. H. Hallam Anglin, M.A., LL.B., 
M.R.I.A., . . . . . . . .236 
Election of Office-Bearers, ...... 245 
An Essay upon the Limitations in Time of Conscious Sensations. 
By John B. Hay craft, M.B. Edin., F.R.S.E., &c. ; Professor of 
Physiology in the Mason Science College, and Lecturer on Physi- 
ology at Queen’s College, Birmingham, . . . . 246 
