Jan. 30, 1879] 



NATURE 



ci 



DIARY OF SOCIETIES. 



London 



THURSDA y, January 30. 



Royal Society, at 8.30. — On the Effect of Heat on the Di-Iodide of Mer- 

 cury, 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 Trevandrum : B. Stewart and Morisabro 

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

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



London iNSTiTirrioN, 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, Frbruary i. 



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



SUNDAY, February 2. 

 Sunday Lecture Society, at 4.— Religious Parallelisms and Sjrmbolisms : 

 Matthew Macfie. 



MONDAY, February 3. 

 Royal Institution, at 5. — Monthly Meeting. 

 London Institution, at 5.— Birth, Life, and Death of a Storm : R. H. 



Scott. 

 Medical Society, at 8.30. — Lettsomian Lecture. 

 Victoria Institute, at 8.— The Torquay Caves : J. E. Howard. 



TUESDAY, February 4. 



Zoological Society, at 8.30. — Notes on Points in the Anatomy of the 

 Hoatzin (Opisthoconius cristatus): Prof. A. H. Garrod, F.R.S. — On the 

 Breeding of the Argus Pheasant and ether PhasianiJse in the Society's 

 Gardens : Mr. Sclater. — On a New Genus and Species of Salticides : Rev. 

 O. P. Cambridge. 



Society OF Arts, at 8. — The District to North of Lake Nyassa: H. B. 

 Cotterell. 



Royal Institution, at 3.— Animal Development : Pro£ Schafer. 



WEDNESDA Y, February 5. 



Geological Society, at 8.— On the Occurrence of Pebbles with Upper- 

 Ludlow Fossils in the Lower Carboniferous Conglomerates of North 



; Wales: A. Strahan, MA., and A. O. Walker, F.L.S.— On the Meta- 

 morphic Series between Twt Hill and Port Dinorwie : Prof. T. G. Bonney, 

 F.R.S., andF. T. S. H jughton, B.A.— On the Quartz-felsite and Asso- 

 ciated Rocks at the Ba- eof the Cambrian Series in North-Western Car- 

 narvonshire : Prof. T. G. Bonney, F.R.S. —On a New Group of Pre- 

 Cambrian Rocks (the Arvonian) in Pembrckeshire : Henry Hicks, M.D. 

 With an Appendix by T. Davis. — On the Pre-Cambrian (Dimetian, 

 Arvonian, and Pebidian) Rocks of Carnarvonshire and Anglesea : Henry 

 Hicks, M.D. With an Appendix by Prof. T. G. Bonney, F.R.S. 



Society of Arts, at 8.— Best Methods for Improving Condition of Blind : 

 Dr. T. R. Armitage. 



THURSDAY, February 6. 



Royal Society, at 8.30. — On Certain Dimensional Properties of Matter in 

 the Gaseous State : ftof . Osborne Reynolds. 



Chemical Society, at 8. — Discussion on Dr. Tidy's Paper on the Pro- 

 cesses for Determining the Organic Purity of Potable Waters. 



Linnean Society, at 8.— Anatomy of Ants : Sir John Lubbock, Bart.— 

 Bulls-thorn Acacia (A. sfktrrocephala): R. Irwin L>Tich. — Habits of 

 Ants, Bees, and Wasps : Sir John Lubbock, Bart. — Position of the Genus 

 Segr/emi'a among the Gastropoda: Dr. J. Gwyn Jeffreys. — Note on the 

 Genus Ottdiieya, Brown : Dr. Henry Trimen. 



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



London Institution, at 7. — Britain in the Later Stone-Age : Prof. Boyd 

 Dawkins. 



FRIDAY, February 7. 



Royal Institution, at 9. —Bells: Rev. H. R. Haweis. 



Geologists' Association, at 7.30. — Annual ileeting. 



SATURDAY, February 8. 

 Royal Institution, at 3. — Lessing: R, W. Macan. 

 Physical Society, at 3. — Annual General Meeting. 



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