yune 26, 1879] 



NATURE 



Ixix 



DIARY OF SOCIETIES. 



London 



FRIDAY, June xj. 



QnEKKTT MiCSOSCOFICAL Club, at 8. 



SATURDAY, Juke 28. 

 Physical Society, at 3. 

 Geologists' Association. — Excursion to Tunbridge and Tunbridge Wells. 



MONDAY, June 30. 

 Statistical Society, at 4.30. — Annual Meeting. 



WEDNESDAY, July 2. 

 Entomological Society, at 7. 



THURSDAY, July 3. 

 Geologists* Association, at 8. 



"subscriptions to nature 



Yearly 28J. 



Half-yearly 14J. 6ct. 



Quarterly js. 6d. 



To the Colonies, United States, the Continent, and 

 all places within the Postal Union ; — 



Yearly 30J. 6d. 



Half-yearly i^s. 6d, 



Quarterly is. 



Office : 29, Bedford Street, Strand. 



EAGLE INSURANCE COMPANY, 



79, PALL MALL. 

 For Lives only. Established 1807. 



Net Premiums and Interest •• m. ••■ •» ;£3g6,8i8 



Accun^ulated Funds ... .» » .h ^3,083,281 



Also a Subscribed Capital o€ more than ... .» ^1,500,000 



Report*, Prospectuses, and Forms may be had at tbe Office, or from any 

 of the Company s Agents, post free. 



GEORGE HUMPHREYS, Actuary and Secretary. 



EUDOLPH KOENIG, 



(DR. PHIL.) 

 MANUFACTURER OF 



ACOUSTICAL INSTRUMENTS. 



TO ILLUSTRATE THE LAWS 

 AND TO PRODUCE THE PHENOMENA OF SOUND, 



PARIS. 26, RUE DE PONTOISE. 



PRICE LISTS FREE. 



W. F. STANLEY, 



Mathematical Instrument Manufacturer 



To H.M.'s Government, Council of India, Science and Art 



Department, Admiralty, &c. 



Mathematical, Drawing, and Surveying Instruments of every description, of 



the highest (luality and finish, at the most moderate prices. 



Price List post Jree. Engine Divider to the Trade. 

 ADDRESS- 

 GREAT TURNSTILE, HOLBORN, LONDON, W.C. 



The LANCASTER POCKET CAMERA 



for plates 4I X 3J inch, havintt three double dry-plate Slldei, Umbrella 

 Stand, be<^t I<ens with plate of Diaphragms, &c., &c., ;f 5. Particulars 



free. 



The LANCASTER CARTE PHOTOGRA- 

 PHIC APPARATUS, with Chemicals, &c.. &c., complete, i^ 5J. 

 FIRST QUALITY ASTRONOMICAL TELESCOPES with Object 

 Lens«s, by Wray, ai-inch, £,^ or. ; al-inch, £,^ los, ; aj-inch, £io ; 

 3. inch, An loj. ; 3l-inch, £1515*.; 4-inch, £2$; 4]-inch, ^£40; 

 5-inch, ;£5^, &c. Capital Student's Microscope, £^ y. Collegian's 

 First Quahty Microscope, /«; y. Illustrated Catalogue, 3 Stamps. 

 J. LAN'CASTER & SON, Opticians Birmingham. 



HORNE'S POMPEIAN DECORATIONS, 

 ROBERT HORNE, 



HOUSE DECORATOR and PAPER-HANGING 



MANUFACTURER, 



41, GRACECHURCH STREET, LONDON, E.C. 



Fy Special Appointment to Hu H^esty the King of Italy. 



By JOHN FISKE, M.A., LL.B. 

 OUTLINES OF COSMIC PHILOSOPHY, 



Based on the Doctrine of Evolution, with Criticisms on the 

 Positive Philosophy. 2 vols., 8vo. 25^. 



DARWINISM, AND OTHER ESSAYS. 



[At-irr/j/ ready, 

 MACMILLAN & CO., London. 



NOTICE OF REMOVAL. 



JAMES HOW & CO., 



SCIENTIFIC INSTRUMENT MAKERS, 



73, FARRINGDON ST., LONDON 



(Late of 5, St. Bride St., and a, Foste-* Lane). 



HOW'S STUDENT'S MICROSCOPE. HOW'S MICROSCOPE LAMP. 



Rock Sections and other Objects for the Microscope. 



Now ready, a Revised Edition. 



NEGRETTI & ZAMBRA'S 



ENCYCLOPAEDIC 



lUnstrated and Descriptive 

 CATALOGUE OF 



SCIENTIFIC INSTRUMENTS. 



(Containing very numerous Comparative Tables of Reference and 



Illustrated by upwards of TWELVE HUNDRED ENGRAVINGS, 



Six Hundred Pages, Royal 8vo, cloth, gilt lettered, Price 5.?. 61/.).' 



Optical, Mathematical, Philosophical, Photographic, 



AND 



STANDARD METEOROLOGICAL 



INSTRUMENTS. 



MANUFACTURED AND SOLD BY 



NEGRETTI AND ZAMBRA, 



opticians and Scientific Instnnnent Makers to 



The Royal Observatory, Greenwich; the Admiralty ; Hon. Board of Ordnance; 



Board of Trade : the British Meteorological Society: the Observatories 



Kew, Toronto, Washington, Victoria : East Indian Government. 



HOLBORN VIADUCT, E.G. 



ALSO AT 



45, CORNHILL, E.G., & 122, REGENT STREET, W., 

 LONDON. 



LIGHTNING CONDUCTORS. 



Experience, accumulated since the time oC Benjamin Franklin, provef 

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

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R. B. NEWrAI.Ii * CO., 130, STRAND, W.C. 



3«, WATERLOO ROAD, LIVERPOOI.. 

 68, ANUERSTON QUAY, GLASGOW. 



MAHUFAOTORY-aATBIHa«.D-ON-TYNB 



