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Monday , 2nd Ma\y 1887. 
The Objective Cause of Sensation. Part III. — The Sense of Smell. By 
Professor John Berry Hay craft, ...... 207 
On the Physics of Noise. By Professor Crum Brown, .... 219 
On the Physical Properties of Methyl-Alcohol. By Professor Dittmar and C. 
A. Fawsitt, Esq., ........ 219 
On the Instability of the Double Sulphates 
M"S0 4 .R' 2 S0 4 + 6H 2 0 
of the Magnesium Series. By W. Dittmar, Esq., . . . .219 
A Diatomaceous Deposit from North Tolsta, Lewis. By John Rattray, Esq., . 220 
Monday, \6th May 1887. 
On the Increase of Electrolytic Polarization with Time. By W. Peddie, Esci., 
B. Sc., .......... 221 
On the Blood of Myxine. By Professor D’Arcy W. Thompson, . . .221 
On the Larynx and Stomach in Cetacea. By Professor D’Arcy W. Thompson, 221 
On Transition Resistance at the Surface of Platinum Electrodes, and the Action 
of Condensed Gaseous Films. By W. Peddie, Esq., B.Sc. (Plate VII.), . 221 
Researches on the Problematical Organs of- the Invertebrata — especially those of 
the Cephalopoda, Gasteropoda, Lamellibranchiata, Crustacea, Insecta, and 
Oligochseta. By Dr A. B. Griffiths, F.R.S. (Edin.), F.C.S. (Lond. & 
Paris), Principal, and Lecturer on Chemistry and Biology, School of Science, 
Lincoln ; late Lecturer on Chemistry, Technical School, Manchester, &c., . 230 
The Nephridia of Lanice conchilega, Malmgren. By J. T. Cunningham, Esq., . 238 
Monday, 6th June 1887. 
On a Furnace capable of melting Nickel and Cobalt. By J. B. Readman, Esq., 240 
On the Fossil Flora of the Radstock Series of the Somerset and Bristol Coal 
Fields. Concluding Part. By R. Kidston, Esq., .... 240 
On the Discharge of Albumen from the Kidneys of Healthy People. By Pro- 
fessor Grainger Stewart, M.D., ...... 240 
The Salinity and Temperature of the Moray Firth, and the Firths of Inverness, 
Cromarty, and Dornoch. By Hugh Robert Mill, D.Sc., Scottish Marine 
Station. (Plate VIII.), ....... 250 
On the Presence of Bacteria in the Lymph, &c., of Living Fish and other Verte 
brates. By J. C. Ewart, M.D., Regius Professor of Natural History, Uni- 
versity of Edinburgh, ........ 262 
Monday, 20th June 1887. 
On the Origin of the Great Alpine Lakes. By Professor Sacco, University of 
Turin, . . . . . . . . . 271 
On the Minute Oscillations of a Uniform Flexible Chain hung by one End ; and 
on the Functions arising in the course of the Inquiry. By E. Sang, Esq., 
LL.D. (Plate IX.), . . . ... . .283 
Note on the Biological Tests employed in determining the Purity of Water. By 
A. W. Hare, Esq., M.B. Edin. (Plates X., XI.), .... 306 
Alternants which are Constant Multiples of the Difference-Product of the 
Variables. By A. H. Anglin, Esq., M.A., ..... 313 
Glories, Halos, and Coronse seen from Ben Nevis Observatory. Extracts from 
Log Book. By R. T. Omond, Esq. Communicated by Professor Tait. 
(Plate XII.), 314 
Monday, 4th July 1887. 
Thermal Conductivity of Iron, Copper, and German Silver. By A. C. Mitchell, 
Esq. Communicated by Professor Tait, ..... 327 
On the Probability that a Marriage entered into by a Man of any Age, will be 
Fruitful. By T. B. Sprague, Esq., M. A., . 327 
On the Nephridia of Hirudo medicinalis. By Dr A. B. Griffiths, F.R.S.E., 
F.C.S. (London & Paris), Principal, and Lecturer on Chemistry and 
Biology, School of Science, Lincoln, ...... 346 
On Degenerated Specimens of Tulipa sylvestris. By Mrs A. B. Griffiths. 
Communicated by Dr A. B. Griffiths, F.R.S.E., &c., . . . 349 
The Luminous Organs of Nyctiplianes norvegica , Sars. By J. T. Cunningham, 
B. A., and Rupert Vallentin, Esq., . . . . . 351 
On a Constant Daniell Cell, for use as a Standard of Electromotive Force. By 
Cosmo I. Burton, B.Sc., F.C.S., . .... 356 
