Jan. 23, 1879] 1 



NATURE 



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OflSce : 29, Bedford Street, Strand. 



and 



DIARY OF SOCIETIES. 



London 



THURSDAY, January 23. 



Royal Society, at 8.30. — Researches on Chemical Equivalence, Part i : 

 Dr. MiUs and T. W. Walton : Part 2 : Dr. Mills and J. Hogarth —Re- 

 searches on Lactin : Dr. Mills and J. Hogarth. — On the Microrheometer : 

 J. B. Hannay. — Limestone as an Index of Geological Time : T. M. 

 Reade. — Preliminary Note on the Substances which produce Chromo- 

 spheric Lines : J. N. Lockyer. 



RoYAi. Institution, at 3.— Electric Induction : J. E. H. Gordon. 



London IxsTiTtrriON, at 7. — Fauna and Flora of Prehistoric Periods : Prcf. 

 Rolleston. 



FRIDAY, January 24. 



RoY.\L Institution, at 9. — The Mirror of Japan : Prof. Ayrton. 



QOEKETT Microscopical Club, at 8. — On the Urticating Threads of 

 Actinia parasitica: F. A. Bedwell, M.A., F.R.M.S.— On a New Method 

 of Preparing a Dissected Model of an Insect's Brain, from Microscopic 

 Sections: E. T. Newton, F.G.S. 



SATURDAY, jKy.VK'Rs 23. 

 Royal Institution, at 3. — Reptilian Life : Prof. Seeley. 

 Physical Society, at 3. — Studies in Vibration : Dr. F. Guthrie, F.R.S. 



SUNDAY. January 26. 



SiWDAY Lecture Society, at 4. — ^The Microscope in Geology : Rev. J. F. 

 Blake. 



MONDAY, January 27. 



Medical Society, at 8.30. 



London Institution, at 5. — Health and Recreation : Dr. B. W. Richard- 

 son. 



Society of Arts, at 8. — Mathematical Instruments: W. M. Williams. 



Institute of Actuaries, at 7. — The Messenger Prize Essay ; on Sur- 

 render Values : G. S. Crisford. 



Royal Geographical Society, at 8.30. — The Road to Merv : Maj -Gen. 

 Sir Henry C. Rawlinson, K. C. B. — The Recent Overflow of the Lower 

 Oxus. 



TUESDAY, January 28. 



Royal Institittion, at 3. — Animal Development: Prof. Schafer. 



West London Scientific Association, at 8. 



Metropolitan Scientific Association, at 7. 



IVEDXESDAY, January 29. 

 Society of Arts, at 8. — The IHstrlbution of Disease : A. Haviland. 



THURSDAY, Janiarv 30. 



Royal Society, at 8.3o.^Dn the Effect of Heat on the Di-lodide of Mer- 

 cur>-, Hglj : G. F. Rodwell and H. M. Elder.— A Comparison of the 

 Variations of the Diurnal Range of Magnetic Declination as Recorded at 

 the Observatories of Kew and Trevandram : B. Stewart and Morisabro 

 Hiraoka. — On the Determination of the Rate of Vibration of Tuning- 

 Forks : H. McLeod and Lieut. G. S. Clarke. — On Certain Means of 

 Measuring and Regulating Electric Currents : C. W. Siemens. 



Society of Arts, at 8. — Gas Illumination ; Dr. W. Wallace. 



Royal iNSTiTirriON, at 3.— Electric Induction: J. E. H. Gordon. 



London Institution, at 7. — Meaning and Origin of the Laws of Nature: 

 Sir Edmund Beckett. 



FRIDAY, January 31. 



Royal Institution, at 9.— Logic of Architectural Design : H. H. Statham. 



Society of Arts, at 8. — Quest and Early European Settlement of India : 

 Dr. G. Birdwood. 



SATURDAY, February i. 



Royal Institution, at 3. — Reptilian Life: Prcf. H. G. Seelej-. 



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