April 17, 1879] 



NATURE 



CXClll 



DIARY OF SOCIETIES. 



London 



THURSDAY, April 17. 



Chemical Society, at 8. — On the Determination of Tartaric Add In Lees and 

 Inferior Argols, with some Remarks on Filtration and Fhrecipitation : B. J. 

 Grosjean. — On Conditions affecting the Equilibrium of Certain Chemical 

 Systems: M. M. P. Muir. 



LiNNEAN Society, at 8.— New Guinea Birds: R. Bowdler Sharpe.— Zoolo- 

 gical Memoranda, Xile Land : Dr. J. Murie.— On the Occurrence of 

 Gadiis macroce^haius at the Mouth of the Thames : Dr. F. Day. 

 SUNDA V, April 20. 



StJKDAY LECTtJBE SOCIETY, at 4. — Relation of Science to Religion : Dr. 

 Andrew Wilson. 



MONDAY, April 21. 



Society of Arts, at 8.— Recent Advances in Telegraphy : W. H. Preece. 



Victoria iNSTrrirrE, at 8. — System of Zoroaster: R. Brown. 



Medical Society, at 8.30. 



TUESDAY, April 22. 

 Royal Institution, at 3. — Schubert : Ernest Pauer. 

 Metropolitan Scientific Association, at 7. 

 West London Scientific Association, at 8. — Molecxilar Motion : Dr. 



W. M. Ord. 

 Horticultural Society, at i. — Scientific Committee. 



lYEDNESDAY, April 23. 

 Society of Arts, at 8.— English Freshwater Fisheries : J. Willes-Bund. 

 Royal Society of Literature, at 8.— WTiat is Poetry? G. W. Moon. 



THURSDAY, April 24. 

 Royal Society, at 8. 30. 

 Royal Institution, at 3. — ^Dissociation : Prof. Dewar. 



FRIDAY, April 23. 



Royal Institution, at 9.— Generic Images : Fr. Galton. 



Quekett Microscopical Club, at 8.— On a Method of Resolving the 

 Finest-lined Diatomaceous Tests : Adolf Schulze.— On the Reproductive 

 System of Certain of the Acarina: A. D. Michael, F.R.M.S. 



SATURDAY, April 26. 

 Royal Institution, at 3.— Architecture: H. H. Statham. 

 Physical Society, at 3 



TO 



SUBSCRIPTIONS 



Yearly 



Half-yearly . . . 

 Quarterly .... 

 To the Colonies, United States, 

 all places within the Postal Union 



Yearly 



Half-yearly .... 

 Quarterly 



NATURE 

 . 28J. 



. 14J. 6d. 

 7s. 6d. 



the Continent, and 



30J. 



1 5 J. 



8j. 



6d. 

 td. 



Office : 29, Bedford Street, Strand. 



THE BEST FARMERS' NEWSPAPER, 



THE CHAMBER OF 

 AGRICULTURE JOURNAL 



AND FARMERS' CHRONICLE, 



Edited by John Algernon Clarke, Secretary to the Central Chamber 



of Agriculture, 

 Devotes tpeoal attention to the discussions and proceedings of the Chamber 

 of Agriculture of Great Britain (which now number upwards of 18,000 

 members), besides giving original papers on pracrical farming, and a mass of 

 intelligence of particulai value to the agriculturist. 



The London Com, Seed, Hop, Cattle, and other Markets o£ Monday are 

 specially reported in this Journal, which is despatched the same evening so 

 as to ensure delivery to country subscribers by the first post on Tuesday 

 morning. Price yi. , or prepaid, 15.1. a year post free. 



Published by W. PICKERING 21. Arundel Street. Strand, W.C 



W. L A D D & CO., 



Scientific Instrament Mannfactnrers 



{By A^pcintrnttU U th^ R»yal InsHtuHoH of Great Britattti, 



II & 12, BEAK STREET, REGENT STREET, W. 



BYRNE'S PATENT COMPOUND PLATE PNEU- 

 MATIC BATTERY for Cautery and general purposes. 



EDMUNDS' PHONOSCOPE for makuig Vocal Vibra- 

 tions visible in a Vacuum Tube. 



HUGHES' MICROPHONE. 



TELEPHONIC APPARATUS, ftc. 



LADD'S IMPROVED SELF-CHARGING HOLTZ 

 ELECTRICAL MACHINE, with 4 to 12 Plates, in- 

 closed in a Mahogany and Glass Case. This instrament is 

 immediately available in any condition of the atmosphere. 

 Philosophical Apparatus of every Description. 



lUutirated Catalogtu, Suc^t^t, 



STATISTICAL SOCIETY'S JOURNAL. 



Now ready. Part I., Vol. XLII., March, 1879, price 51. 



Contests. 



Reports on — i. The Fourth Session of the Permanent Commission of the 

 International Statistical Congress held in ParLs in July, 1878. 



2. The First Session of the International C.ngress of Demography and 

 Medical Geography held in Paris in July, 1878. 



3. The Second Session of the International Prison Congress held in Stock- 

 holm in August, 1878. By F. J. Mouat, M.D., F.R.C.S., Foreign Secre- 

 tary and Delegate of the Society. 



On the Fall of Prices of Commodities in Recent Years. By Robert 

 Giffen, Esq. 



The Famines of the World, Past and Present. Part II. By C. Walford 

 F.I. A., Barrister at-Law, &c., &c 



Miscellanea. — I. Financial and Commercial History of 1878. II. Prices 

 of Exports from 1861 to 1877. III. Fires in the Metropolis during 1878. 

 IV. Enghsh Literature in the Year 1878. V. Universiiy Boat-Races and 

 Sun-Spot Cycles. VI. The Death Rate and the Morions of the Planet 

 Jupiter. _VII. Notes on EconDmical and Statistical Works. VIII. Additions 

 to the Library, with Notes, Periodical Returns, &c. 



London : EDWARD ST.ANFORD, 55, Charing Crc^s, S. W. 



THE BREWERS' GUARDIAN : 



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

 Licensing, Legal, and Parliamentary Matters. 

 Review of the Malt and Hop Trades ; and Wwe and Spirit Traoi 

 Record. 

 The Organ of the Country Brewers. 

 " The Brewers' Guardian " is published on the evenings of every alternate 

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

 Subscription, 161. (>d. per annum, post free, dating from any quarter-day. 

 Single Copies, ir. each. Registered for transmission abroad- 



Offices -5, Bond Court, Walbrook, London, E.C. 



NORTH BRITISH AGRICULTURIST, 



Is the only Agricultural Journal in Scotland, and circulates extensively 

 amongst landed proprietors, factors, farmers, farm-bailiffs, and others 

 interested in the management of landed property throughout Scot.and and 

 the Northern Counties of England. 



The AGRICULTURIST hiu also a very considerable circulation on the 

 Continent of Europe, America, Australia, and the Colonies. 



The AGRICULTURIST is published every Wednesday afternoon in 

 time for the evening mails, and contains Reports of all the principal British 

 and Irish Markets of the week, besides telegraphic reports of those held e> 

 the day of publicarion. 



The Veterinary Department is edited by one of the leading Veterinarians 

 in the country, and is invaluable to the breeder and feeder as a guide to the 

 rearing of animals, and their treatment when labouring under disease. 



Full Reports are given of the Meetings of the Royal Agricultural Society 

 of England, the Royal Agricultural Society of Ireland, the Highland and 

 Agricultural Society of Scotland, the Scottish Chamber of Agriculttire, 

 and all the principal Agricultural Associations throughout Great Britain 

 and Ireland. 



For Advertisers addressing thenKelves to Farmers a better medium docs 

 not exist. 



Price yL By post, ■^. Annual Subscrq>tioo, p«yable in advance, 141. 



Office. — 377, High Street, Edinbiu^h. 



Fost-Office Orders payable to Charles Andeison, Jun., Edinburgh. 



Established 1843. 



THE ENTOMOLOGIST'S MONTHLY 

 MAGAZINE. 



Price Sixpence, Monthly, 24 pages 8vo, with occasional Illustrations. 



Conducted by J. W.Doijglas, R. McLachlan, F.R.S., E. C. Rye, F.Z.S. 



and H. T. Stainton, F.R.S. 



This Magazine, commenced in 1864, contains standard articles and notes 



on all subjects coimected with Entomology and especially on the Insects of 



the British Isles. 



Subscription — Six Shillings per Volume, post free. The volumes com- 

 mence with the June number in each year. 



Vols. I. to V. (strongly bound in cloth) may be obtained by purchasers of 

 the entire set to <iate, at the increased price of lor. each ; the succeeding 

 vols, may be had separately or together, at 7r. each. 



London: JOHN VAN VOORST, i. Paternoster Row. 

 N.B. — Communications, &c., should be sent to the Editors at the above 

 address. 



LIGHTNING CONDUCTORS, 



Experience, accumulated since the time of Benjamin Franklin, prove; 

 conclusively that a Conductor made of Copper of aidequate size is the best 

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

 destructive effects of lightning. 



NEWALL & CO.'S 



PATENT COPPER LIGHTNING CONDUCTOR, 



As applied to all kinds of Buildmgs and Shippmg in alt parts of the world 

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

 Conductor ever offered to the pubUc. 



It is simple in its application, no insulators being required, and it costs 

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

 R. S. NElVAbli 9i CO.' 130, STRAND, W.C 



36, WATERLOO ROAD, LIVERPOOl. 

 68, ANDERSTON QUAY, GLASGOW. 

 MANUFACTORY— GATESHBAD-ON-TYNS, ^ 



