Feb. 20, 1879] 



NATURE 



ex XV 



DIARY OF SOCIETIES. 



London 



THURSDAY, February ao. 

 RoYAi. Society, at 8.30. — On Electrical Insulation -in High Vacua : \V. 



Crookes. — On the Reversal of the Lines of Metallic Vapours, No. IV. : 



Professors Liveing and Dewar. 

 Royal Institution, at 3.— Sound : Prof. Tyndall. 

 London Imstitution, at 7. — Fixed Water: Prof. Guthrie. 

 LiNNEAN Society, at 8.— On the Genus Oudtuya, BrowB : Dr. Henry 



Trimen. — On the Nature of the Inflorescence : Dr. Maxwell Masters. — 



On some South American Genera of Plants of Uncertain Position : John 



Miers. 

 Chemical Society, at 8.— Investigations into the Action of Substances in 



the Nascent and Occluded Conditions. Hydrogen (continued): Dr. 



Ciladstone and Mr. Tribe. — On some Methods of Vapour Density Deter- 



iiiination : J. T. Brown. — On the Quantitative Blow-pipe Assay of Mercury : 



G. Attwood. 



FRIDAY, February 21, 

 Royal Institution, at 9.— A New Chemical Industry: Prof. Roscoe. 

 Royal College of Surgeons, at 4.— Evolution of the Vertebrate: Prof. 



Parker. 

 Geological Society, at 8. — ^Anniversary. 



SATURDAY, February 22. 

 Physical Society, at 3.— On a Current Regulator: Dr. C. W. Siemens, 



F.R.S. — On a New Theory of Terrestrial Magnetism : Professors Ajrton 



and Perry. — On the Spectrum of Lightning : Dr. A. Schuster. 

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



SUNDAY, February 23. 



Sunday Lecture Society, at .4.— The English Rule in India : Sir Arthur 

 Hobhouse. 



MONDAY, February 24. 



Society of Arts, at 8. — Dwelling Houses ; their Sanitary Arrangements : 

 Dr. W. H. Corfield. 



London Institution, at 5.— Modem Chemical Theory : Prof. H. E. Arm- 

 strong. 



Royal College op Surgeons, at 4. — Evolution of the Vertebrata: Prof. 

 Parker. 



.Society of Antiquaries, at J7.— Enfranchisement of Copyholds of In- 

 heritance : E. Smyth. 



TUESDAY, February 25. 

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

 Anthropological Institute, at 8.— The Primitive Human Family : C. 



Staniland Wake.— Notes on the Colour of Skin, Hair, and Eyes : E. W. 



Brabrook, F.S.A. 

 West London Scientific Association, at 8. 

 Metropolitan Scientific Association, at 7. 



WEDNESDAY, February a6. 



Geological Society, at 8. — A Review of the British Carboniferous Fene- 

 stellidx: G. W. Shrubsole. — Note on a Femur and Humerus of a small 

 Mammal from the Stonefield Slate : Prof. H. G. Seeley, F.L.S.— Note on 

 Poikilopleuron Bucklandi, of E. Deslongchamps, pere, identifying it with 

 Megalosaurus Bucklandi : J. W. Hulke, F.R.S. — Vectisaunis valdensis, 

 a New Wealden Dinosaur: J. W. Hulke, F.R.S. 



Royal College of Surgeons, at 4.— Evolution of the Vertebrata: Prof. 

 Parker. 



Society of Arts, at 8.— Indian Pottery at the Paris Exhibition: Dr. 

 Birdwood. 



Royal Society of Literature, at 8. — On an Unrecorded Event in the 

 Life of Sir Thomas More : Mr. Brabrook, F.S.A. 



THURSDAY, February 97. 



Royal Society, at 8.30. — Studies in Acoustics. I. On the Synthetic 

 Examination of Vowel Sounds : W. H. Preece and Aug. Stroh. 



Royal Institution, at 3.— Sound: Prof. TyndalL 



London Institution, at 7. — The Age of Dragons: B; Waterhouse 

 Hawkins. 



FRIDAY, February 28. 



Royal Institution, at 9.— The Sorting Demon of Maxwell: Sir W. 

 Thomson. 



QuEKETT Microscopical Club, at 8.— On a Mode of Displaying Objects 

 by the Microscope, Irrespective of their Siie (the Micro-megascope) : Dr. 

 Matthews. F.R.M.S.— The Rotifers by Dark Field Illumination, Illus- 

 trated by Transparencies : Dr. C. T. Hudson, M.A., F.R.M.S. 



Royal College of Surgeons, at 4. — Evolution of the Vertebrata: Prof. 

 Parker. 



SATURDAY, March i. 



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



SUBSCRIPTIONS TO NATURE 



Yearly 28J. 



Half-yearly 14J. 6//. 



Quarterly 7J. dd. 



To the Colonies, United States, the Continent, and 

 all places within the Postal Union : — 



Yearly 30?. 6^, 



Half-yearly ISJ. 6<f. 



Quarterly 8j. 



Office : 29, Bedford Street, Strand. 



WANTED, Clean Copies of NATURE, 



No. 358 and 433.— Address Office of Nature, 29, Bedford Street, 

 Strand. 



ZOOLOGICAL SOCIETY'S 

 LATEST PUBLICATIONS. 



TRANSACTIONS OF THE SOCIETY. 



VoL X. Part 10, price i6i. , containing : " Notes on the Fins of Elasmo- 

 branchs, with Considerations on the Nature and Homologues of Vertebrate 

 Limbs," by St. George Mivart. (With six Plates and six Woodcuts.) 



Vol. X. Part II, price lis., containing the following Papers: — "On the 

 Mechanism of the Odontophore in certain Mollusca, by Patrick Geddes. 

 (With three Coloured Plates.) 



" On the Hearts of Ceratodus, Protopterus, and Chimsera, with an Ac- 

 count of tmdescribed Pocket Valves in the Conus arteriosus of Ceratodus 

 and of Protopterus," by E. Ray Lankester. (With two Plates.) 



These may be obtained at the Society's Office (11, Hanover Square, W.), 

 at Messrs. Longmans', the Society's PubUshers (Paternoster Row, E.C), 

 or through any Bookseller. 



Stage Micrometers 

 For the Microscope. 



-^ -^ AND -Y^ ENGLISH INCH AND 



Y^ Millimetre. 



WOODWARD'S RIGHT-ANGLED 



PRISM, FOR EXAMINATION WITH 

 IMMERSION OBJECT GLASSES. 



STEPHENSON'S CATOPTRIC OR 



IMMERSION ILLUMINATOR. 



RIVET'S SECTION CUTTER. 

 WEBER'S AQUARIUM SLIDE. 

 NEW CELL MAKING 



,,i INSTRUMENTS. 



THE ''ECONOMIC" BINOCULAR 

 MICROSCOPE. 



Complete, £10 Os. Od. 



!R. & J. Beck, 



31, CORNHILL, 



LONDON, E.C; 



AND 



Q2I, CHESTNUT ST., 



PHILADELPHIA, 



U.S. AMERICA. 



LIGHTNING CONDUCTORS; 



Experience, accumulated since the time o£ Benjamin Franklin, prore! 

 conclusively that a Conductor made of Copper of adequate sire is the b*st 

 of all appliances for the protection of every description o£ building ^om the 

 destructive effects of lightning. 



NEWALL & CO.'S 



PATENT COPPER LIGHTNING CONDUCTOR, 



As applied to all kinds o£ Buildings and Shipping in all parts of the world 

 with unvarying success, is the most Reliable, most Effective, and Cheapest 

 Conductor ever offered to the publia 



It is simple in its application, ne insulators being required, and it costs 

 only one shilling per foot for the standard size, which is safe in any stono. 



R. S. NEWAUi Ob CO.; 130, STRAND, W.C. 



36, WATERLOO ROAD, LIVERPOOL. 

 68, ANDERSTON QUAY, GLASGOW. 

 lOANUFACTOBY— GATESHEAD-ON.TYNE. 



THE BREWERS' GUARDIAN; 



A Fortnightly Paper devoted to the Protection of Brewers* Interests, 



Licensing, Legal, and Parliamentary Matters. 



Rktisw of TMt Malt and Hop Trades ; and Wink and SFniT Tkabs 



Record. 



The Organ of the Country Brewers. 



"The Brewers' Guardian " is pubhihed on the evenings of every altemat* 



Tuesday, and is the only journal officially connected with brewing interests. 



Subscription, i6y. id. per annum, post free, dating from any quarter-day. 

 Single Copies, i;. each. Registered for transmission abroad. 



Offices— s> Bend Court, Walbrook, London S.C.. 



