Dec. 26, 1878] 



NATURE 



Ixi 



SUBSCRIPTIONS TO NATURE 



Subscribers are asked to note that the subscriptions 

 to Nature are as follows : — 



Yearly 28J. 



Half-yearly . . 

 Quarterly . . . 

 To the Colonies, United 

 all places within the Postal U 

 Yearly . . 

 Half-yearly 

 Quarterly 



7s. dd. 



States, the Continent, and 

 nion : — 

 . . . 3oir. td. 



. . . 15J. 6d. 

 8s. 



Office : 29, Bedford Street, Strand. 



DIARY OF SOCIETIES. 



London 



FRIDAY, December 27. 

 QuKRKiT Microscopical Club, at 8. 



SATURDAY, December 28. 

 RoVAL iNSTiTimox, at 3.— Juvemle Lecture: A Soap Bubble: Prof. 

 Dewar. 



SUNDA Y, December 29. 

 Sunday Lecture Society, at j. — The Origin of Xerv-es : Andrew Wilson, 

 Ph.D.,F.R.P.S.E. 



MONDAY, December 30. 

 London Institution, at 5.— The Phonograph, Taslmeter, and Carbon 

 Telephone : Prof. Barrett 



TUESDAY, Dhcbmber 31. 

 Royal Institutiox, at 3. — Juvenile Lccttu-e; A Soap Bubble: Prof. 

 Dewar. 



THURSDAY, January 2. 

 Royal Institution, at 3.— Juvenile Lecture; A Saap Bubble: Prof. 



Dewar. 

 London Institution, at 7. — The English Stage : Prof. H. Mcrley. 



FRIDAY, January 3. " ' 



Society of Arts, at 7.— Juvenile Lectiu^e : W. R. S. Ralston. 

 Geologists' Association, at 8. 



SATURDAY, January 4. 

 Royal Institution, at 3 — Juvenile Lecture; A Soap Bubble: Prof. 

 Dewar. 



HORNE'S POMPEIAN DECORATIONS. 



ROBERT HORNE, 



HOUSE DECORATOR and PAPER-HANGING 



MANUFACTURER, 



41, GRACECHURCH STREET, LONDON, E.G. 



By Special Appointment to His Majesty the King of Italy. 



JAMES WOOLLEY, SONS, & CO., 



(>^, MARKET STREET, MANCHESTER. 



CHEMICAL APPARATUS AND REAGENTS 



For Lecture and Class Demonstrition, Laboratory Instruction, &c 



SETS OF APPARATUS AND CHEMICALS 



For the various Public Examinations. 



Portable Chemical Cabinets adapted f<tr private study. 



Price Lists on Application. 



ENGRAVINGS AND ELECTROTYPES 



FOR SALE, at prices ranging from is. to loj., in good condition, ready for 

 printing. Small, medium size, and large engravings, comprising a great 

 variety of subjects, suitable for Publishers, Advertisers, and Amateurs. 

 Specimen of any subject required sent post free on application. 



FACSIMILE OF SIGNATURE for sj. An exact copy of any name 

 guaranteed. These signatures being engraved in bold relief, are useful for 

 Stamping Books, Circulars, and Documents, or Marking Linen, and made 

 type-high for ordinary Letterpress Printing. 



Sent post free to any address on receipt of 36 stamps. 



75, FLEET STREET, LONDON, E.G. 

 ARTISTIC— To Ladies and Gentlemen with 



some leisure time, desiring to supplement their incomes, an opportunity 

 is offered of acquiring the ART of DRAWING and ENGRAVING 

 on WOOD in a thoroughly satisfactory and perfect style. The terms 

 are moderate, and the hours can be made to suit the convenience of 

 pupils. Persons residing in the country can receive full instruction by 

 correspondence. For further particulars call or address Mr. J. Frank- 

 lin Nash, Artist and Engraver, 75, Fleet Street, London, E.C. 



PROF. TYNDALL'S "LESSONS IN 



ELECTRICITY." Complete Apparatus to illustrate the above, in 

 large Case, £,^ jos. Price List post free. Book, zr. 6d. post free.— 

 Stanley, Optician, Railway Approach, London Bridge, S. E. 



EAGLE INSURANCE COMPANY, 



79, P.ALL MALL. 

 For Lives only. Established 1807. 

 Net Premiums and Interest .~ ._ ... ... ... .^ ;f 396,818 



Accumulated Funds .„ ._ ... .„ ... ... ... ... ;£3,o83,28i 



Also a Subscribed Capital of more than ... ... X 1.500,000 



RepOTts, Prospectuses, and Forms may be had at the OflSce, or from aaif 

 of the Company s Agents, post free. 



GEORGE HUMPHREYS, Actuary and Secretary. 



LIGHTNING CONDUCTORS. 



Expenence, accumulated since the lime of Ber.jaTr.:n Franklin, prcTet 

 conclusively that a Conductor made of Copper of adequate size is th« b^s* 

 of all appliances for the protection of every description of building fiom the 

 destructive effects of lightning. 



NEWALL & CO.'S 



PATENT COPPER LIGHTNING CONDUCTOR, 



As applied to all kinds of Buildings and Sh:pping in all 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 ^>plication, no msnlators beiiig required, and it costs 

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

 R. S. N£V^AI.Ii «k CO., 130, STRAND, W.C 



36, WATERLOO ROAD, LIVERPOOL. 

 63, ANDERSTON QUAY, GLASGOW. 

 MANUFACTORY— GATESHEAD-ON-TYNK 



EUDOLPH 



KOEMG, 



(DR. PHIL.) 

 MANUFACTURER OF 



ACOUSTICAL INSTRUMENTS. 



TO ILLUSTRATE THE LAWS 



AND TO PRODLXE THE PHENOMENA OF SOUND. 



PARIS, 26, RUE DE PONTOISE. 



PRICE LISTS FREE. 



MICROSCOPES, OBJECTIVES, &c. 



CENTENNIAL EXHIBITION, PHILADELPHIA, U.S.A. fp 



The Medal and Highest Award has been given for Design, 

 Construction, Optical Excellence, and Moderation in Price, to 



HENRY CBOUCH, 



66, BARBICAN, LONDON, E.G. 



Fully Illustrated Catalogue and fnll Instructions by Post, 6 Stamps. 

 Mailed abroad free. 



NOW READY, 

 SECOND EDITION, 



GRIFFIN'S 



CHEMICAL HANDICRAFT. 



PRICE +». 7<i POST FREE. 



A CATALOGUE OF CHEMICAL APPARATUS: 



ILLUSTRATED, CLASSIFIED, DESCRIPTIVE. 



Demy 8vo, 480 pp., Illiistrated with 1,600 Woodcuts. 



Most Complete and Cheapest List of Apparatus. 



JOHN J. GRIFFIN and SONS, 22, GARRICK STREET, 



LONDON. W.C 



JOHN NORMAN, 



M.\XUFACTURER OF 



MICROSCOPES, OBJECTS, CABINETS 



TABLES. LAMPS, 



And all Glass Appliances for Microscopes^ 



HAS OPENED NEW AND EXTEN.'i^IVE PREMISES AT 



123, Oueen Victoria Street, E.C. 



Lists post free on application. 



