302 



Presents. 



[Apr. 21, 



Liquid. Column 1. Column 2. 



Water '0747 *0815 



Solution sulphuric acid, No. 1 . . '0759 — 



No. 2 . . -0767 — 



No. 3 . . '0765 — 



No. 4.. 0-0778 — 



Methylated spirit . '0354 '0346 



Bisulphide of carbon '0322 — 



Paraffin oil '0264 '0273 



Turpentine oil — "0189 



The temperature of the various experiments differed somewhat, 

 but as a rule was a little under 20° C. The difference of temperature 

 in the two series of experiments on water tends partly to explain the 

 discrepancy in the above results, as the results of previous observers 

 indicate a considerable rise in conductivity with the temperature. 

 For water and the methylated spirit results of a confirmatory nature 

 were obtained by the larger apparatus. 



The experiments were conducted in the Cavendish Laboratory. 



Presents, April 21, 1887. 



Transactions. 



Baltimore: — Johns Hopkins University. Circulars. Vol. VI. No. 56. 



4to. Baltimore 1887. The University. 



Brussels : — Societe Royale Malacologique de Belgique. Proces- 



Yerbal. August — December, 1886. 8vo. Bruxelles. 



The Society. 



Buckhurst Hill : — Essex Field Club. The Essex Naturalist. No. 3. 



8vo. Buckhurst Bill 1887. The Club. 



London: — London Mathematical Society. Proceedings. Nos. 275- 

 282: 8vo. London 1887. The Society. 



Odontological Society. Transactions. Vol. XIX. No. 5. 8vo. 



London 1887. The Society. 



Photographic Society of Grreat Britain. Journal and Transactions. 



Vol. XI. No. 6. 8vo. London 1887. The Society. 



Royal Horticultural Society. Journal. Vol. VIII. 8vo. London 

 1887. The Society. 



Royal Institute of British Architects. Journal of Proceedings. 

 Vol. III. No. 12. 4to. London 1887. The Institute. 



Newcastle : — North of England Institute of Mining and Mechanical 

 Engineers. Transactions. Vol. XXXVI. Part 2. 8vo. New- 

 castle 1887. The Institute. 



