Nov. 2 1, 1878] 



NATURE 



XXI 



DIARY OF SOCIETIES. 



London 



THURSDAY, Xovember 21. 



Royal Socisty, at 8.30. — On a Method of Using the Balance with great 

 Delicacy, and on its Employment to Determine the Mean Density or the 

 Earth : J. H. Poynting. — ^^On Repulsion Resulting from Radiation, Part 

 VI. : W. Crookes, F.R.S. 



Chemical Society, at 8. — The Processes and their Comparative Value for 

 Determining the Quantity of Organic Matter in Potable Waters : Dr. C. 

 M. Tidy.— A Chemical Study of Vegetable Albinism : Prof. A. H. Church. 

 — Researches en the Action of the Copper-Zinc Couple en Organic Com- 

 pounds : Dr. Gladstone and Mr. Tribe. — On a New Gravimetric Method 

 for the Estimation of Minute Quantities of Carbon : Dr. Duprd and Dr. 

 Hake. 



LiNNEAN Society, at 8.— Preliminary Rep-rt en the Mollusca cf the 



Challenger Expedition (viz. , the Genera Dentalium, Siphodentalium, and 



Cadulus): Rev. R. Boog Watson. — On the Sympk-caceae : John Miers. — 



Oc Tuberous Branch Terminations in Vitis gotigy lodes : R. Irwin Lyach 



FRIDAY, November 22. 



QuKKETT Microscopical Club, at 8. 



SATURDAY, No^'EMBER 23. 



Physical Society, at 3.— The Music of Colour and of Visible Motion ; 

 Professors W. E. Ayrton and J. Perry. — On a Condemer of Variable 

 Capacity : C. Boys. 



Ckystallological Society, at 8.3c. — Crystals of Terpene and seme of 

 its Derivatives obtained by Dr. Tdden; Amui. and Potass. Teriodides 

 obtained by Mr. Johnson ; the Spontaneous Production of Tenorlte on 

 Copper Glance : Prof. Maskelyne. — On Cinnabar and Copper PjTltes : 

 Elliot Steel. — The Rhombohedral System : Mr. Lewis. — A Note en the 

 Forms of Sulphur : Mr. Fletcher. — On Rhabdophane : Mr. Lettsom. 

 SUNDAY, November 24. 



Sunday Lecture Society, at 4.— Long and Short Chronologists: Dr. 

 Zerffi. 



MONDAY, November 23. 



Society of Arts, at 8.— Cantor Lecture; Mathematical Instruments; 

 W. M. Williams. 



Royal Geographical Society, at 8.30. 



Medical Society of London, at 8.30. 



TUESDAY, N0VK.MBER 26. 



Anthropological Institute, at 8. — On the E\-ils arising from the Use cf 

 Historical National Names as Scientific Terms: A. L. Lewis. — On some 

 American Illustrations of the Evolution of New Varieties of Men: Prof. 

 Daniel Wikon, LL.D. — On Left-Handedness : Dr. Henry Muirhead. 



West London Scientific Association, at 8. 



Metropolitan Scientific Association, at 7. 



WEDNESDAY, November 27. 



Royal Society of Literature, at 8.— The Earthly Paradise of European 

 Mythology : C. F. Keary. 



Society of Arts, at 8.— The Land of Midlan : Capt. Burton. 

 SATURDAY, November 30. 



Royal Society, at 4. — Anniversary. 



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