Feb. 6, 1879] 



NATURE 



CXI 



THE MINIATURE MICROSCOPE LAMP 



(REGISTERED) 

 PRICE i4f. PORTABLE TIN CASE FOR DITTO, 2*. td. 



JAMES HOW & Co., 



SCIENTIFIC INSTRUMENT MAKERS, 



5. ST. BRIDE ST. {late 2, Fester La>ie\ LOXDON. 



JAMES WOOLLEY, SONS, & CO., 



69, MARKET STREET, MANCHESTER. 



S. 



0. TISLEY <g c, 



OPTICIANS, 



% 



17 a, BROMPTON ROAD, S.W. 



iClose to South Kensington Museum). 



THE PHONEIDOSCOPE 



Aa Instnunent for Obsenring the Colour-Figures of Liquid Films under tho 



action of Sonorous Vibrations. 



B«mg a visible demonstration of the Vibratory and Molecular Motion of a 



Telephone Plate. 



The PHONEIDOSCOPE, with 3 Discs, Bottle of Solution, DescriptiTe 



PUnphlet, &C., in Card^xard Box, lof. f>d, 



MAHUFACTURED AI«5 SOLD WHOLMALB AKD XKTAIL BT 



S. C TISLEV & CO., 17a, BROMPTON ROAD, LONDON, S.W. 

 TELEPHONIC ELECTRICITY. All Materials supplied for eiperi- 

 mental ptnrposes- 



Pric* Lists of Electrical and Aejustie Apparatus, tuith Draiuingt and 

 Description ef the Harmonozraph, Post Free id. 



EAGLE INSURANCE COMPANY, 



79, PALL MALL. 

 For Ln-Ks only. Established 1807. 

 Net Premiums and Interest ... .~ ... »..„... ^£396,818 



Accumulated Funds ... .« .« ... ... ... „. ... ;£3,oS3,38i 



Also a Subscribed Capital o£ more than ... ... ... ... ;£t. 500,000 



Reports, Prospectuses, and Forms may b« had at the Office, or from any 

 of the Company s Agents, post free. 



GEORGE HUMPHREYS, Actuary and Secretary. 



LIGHTNING CONDUCTORS. 



Szpeiience, accumulated since the time o£ Benjamin Franklin, proTe; 

 CndusiTely that a Conductor tpade of Copper of adequate size is ih« b«st 

 of all appliances for the protection o£ every description o£ building £iom the 

 daatroctiTe effects of lightning. 



NEWALL & CO.'S 



PATENT COPPER LIGHTNING CONDUCTOR, 



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

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

 ConductM' ever offered to the public. 



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

 •nly one shilling per foot for the standard siie, which is safe in any storm. 



R. S. NEWAItli at CO.; 130, STRAND, W.C. 



36, WATERLOO ROAD, LIVERPOOL, 

 es, ANDERSTON QUAY, GLASGOW. 

 MAKUFACTORY— GATESHEAD-ON-TYNE. 



MICROSCOPIC OBJECTS. 



Horn Sections, Blood Discs, Feathers, Hairs, Sections of Bone and Teeth, 

 Visit Scales, Anatomical Preparations from the Human Subject and Lower 

 Animals, Palates of Mollusca, Sections of Shells and Pearls, Polyzoa, whole 

 Insects, Parasites, parts of Insects, Ossicula, Spiaes, &c, of Echinoder- 

 mata. Spicules of Sponges and Gcrgonias, Foramiiufera, Botanical Prepara- 

 tions, Diatomacez, Saltt, Cryst^, Sections of Rocks, Fossils, Minerals, 

 ftc 



Ochreous Iron in Moss- like Forms in Caldte, is. 6d. post-free. 



Stellar Mica, or Canadian Phlogopitt, i;. ^d. post-free. 



Catalogues free. 



THOS. D. RUSSELL, 

 48, ESSEX STREET, STRAND, LONDON, W.C. 



CHEMICAL APPARATUS AND REAGENTS 



For Lecture and Class Demonstradea, Laboratory Icstmction, &c 



SETS OF APPARATUS AND CHEMICALS 



For the Tarioos Public Examinatioas. 



PfrtabU ChmticeU Cahinets adapted f»r privatt study. 



Price Lists on Appfieation. 



ENGRAVINGS AND ELECTROTYPES 



FOR SALE, at prices ranging from is. to lor., 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 3*. An exact copy of any name 

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

 Stamping Books, Circulars, and Documents, or Marking T.m-Ti^ 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 cpporti:nitv 

 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 fCurther particulars call or address Mr. J. Frajjk- 

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



NOW READY, 



SECOND EDITION, 



GRIFFIN'S 



CHEMICAL HANDICRAFT. 



PRICE 4i. id. POST FREE. 



A CATALOGUE OF CHEMICAL APPARATUS : 



ILLUSTRATED, CLASSIFIED DESCRIPTIVE. 



Demy Sro, 480 pp., Illnstrated with 1,600 Woodcuts. 



Most CompUU dnd Chempest List of Apparatus. 



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

 LONDON, W.C. 



MICROSCOPES, OBJECTIVES, &c. 



CENTENNIAL EXHIBITION, PHILADELPHIA, U.S.A. 



The Medal and Highest Award has been given f©r Design, 

 Constructien, Optical Excellence, and Moderation in Price, to 



HENRY CROUCH, 



66, BARBICAN, LONDON, E.C. 



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

 Mailed abroad free. 



EUDOLPH KOENIG, 



(DR. PHIL.) 

 MANUFACTURER OF 



ACOUSTICAL INSTRUMliiNTS. 



TO ILLUSTRATE THE LAWS 

 AND TO PRODUCE THE PHENOMENA OF SOUND, 



PARIS, 26, RUE DE PONTOISE. 



PRICE LISTS FREE. 



