Cll 



NATURE 



{July 24, 1879 



GOLD MEDAL, 

 PARIS EXHIBITION. 



In Packets and Tins. Pure 



Cocoa only, with the super- 



6uous oil extracted. 



FRY'S 



COCOA 



"If properly prepared, there is no nicer ^^-^mmmmm^ a ^^''V* 

 or more wholesome preparation of 1^ ^f | U /V f '^ 1^ 

 cocoa."— ^wa; Water, and Air, t.yV | ItAA^^ I 

 edited ty Dr. H assail. 



J. S. FRY & SONS, Bristol and London. 



OLDRIDGE'S BALM OF COLUMBIA 



Prevents Baldness and the Hair turning Grey, and forms the 

 Basis of a Magnificent Head of Hair, Strengthens Wealc Hair, 



and causes tlie 



WHISKERS AND MOUSTACHIOS to GROW FREELY, 



Sold everywhere, 3^. dd., ds. 6d., and lis,, 



Wholesale and Retail, 



33, WELLINGTON STREET, STRAND, LONDON, W.C. 

 Established Sixty Years. 



MICBOSCOPIC OBJECTS. 



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

 Fish 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, Spines, &c., of Echlnoder- 

 mata, Spicules of Sponges and Gorgonias, Foraminifera, Botanical Prepara- 

 tions, BiAtomacex, Salts, Crystals. Sections of Rocks, Fossils, Minerals, 

 &c. 



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



Stellar Mica, or Canadian Phlogopite, is. 3*/. post-free. 



Catalogues free. 



THOS. D. RUSSELL, 



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



PAGET'S PATENT 



GARDEN ENGINES, 



WORKED BY THE FOOT AND MOST CONVENIENT. 



L. 



£0 18s. 



no tub 



c. 



Sold retail by all Ironmongers and 

 Seedsmen, and wholesale by the Manu- 

 facturers, 



PAGET 8c CO., 



LOUGHBOROUGH. 



Full particulars sent on application, 



ADVERTISING. 

 H. MAY <& CO., 



GENERAL ADVERTISING OFFICES, 

 78, GRACECHURCn STREET, LONDON, E.C. 



(The only Address.) 

 ESTABLISHED 1846, 



Advertisements of every description received for insertion in all News- 

 papers, Magazines, Reviews, &c., at the same rates as at the offices of the 

 papers. 



Estimates for General Advertising. Reduction for a series. 



Liheral terms to large advertisers. 



Advertisements are also received for all newspapers, which may be ad- 

 dressed to these Offices, without extra charge, and replies forwarded, if 

 required. 



C. H. MAY & CO., having special communication with the leading news- 

 papers three limes daily, can guarantee the utmost promptitude and correct- 

 ness of insertion to all Adverusements entrusted to them. 



The Press Manual for 1879, containing a complete List of Newspapers 

 published in the United Kingdom. Post free, 6</. 



NOTICE OF REMOVAL. 



JAMES HOW & CO., 



SCIENTIFIC INSTRUMENT MAKERS; 

 73, FAERINGDON ST., LONDON 



(I*ATE OF 5, St. Bride St., and a, Fostek Lane). 

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



Rock Sections and other Objects for the Microscope. 



The LANCASTER POCKET CAMERA 



for plates 4J X 3J inch, havine; three double dry-plate Slides. Umbrella 

 Stand, best Lens with plate of Diaphragms, &:c., &,c., £$• x*articular« 

 free. 



The LANCASTER CARTE PHOTOGRA- 



PHIC APPARATUS, with Chemicals, &c., &c, complete, rj_ kx. 

 FIRST QUALITY ASTRONOMICAL TELESCOPES with Object 

 Lenses, by Wray, 2}-inch, £$ os. \ zj-inch, £,-j las.; 2j-inch, ^lO ; 

 3-inch, j£i2 10s.; 33-inch, £1^ i$s.; 4-inch, ^25; 4j-jnch, £^»i 

 5-inch, £ss, &c. Capital Student's Microscope, £-i y. Collegian*! 

 First Quality Microscope, jC^ 5s. Illustrated Catalogue, 3 Stamps. 

 J. LANCASTER & SON, Opticians BirminKham. 



NEW ILLUSTRATED CATALOGUE of ELECTRIC 



SIGNALS, &c., with Instructions for Fixing. 150 Diagrams. Justoti^ 

 post free, 6 Stamps. 



EDWARD PATERSON, 



Electrical Engineer and Scientific Apparatus Manufacturer, 



3, BEDFORD COURT, COVENT GARDEN, LONDON, 



STEAM WORKS, GRAY'S INN ROAD. 



Experiments in Electric Lighting carried out. 



Electrical Apparatus of all Descriptions for Lecture Purposes Loanei out, 



APPARATUS for CLASS DEMONSTRATION and for SCIENCE 



SCHOOLS. 

 ELECTRIC LIGHT APPARATL^S. 

 SIEME>fS and GRAMME'S DYNAMO MACHINES and LAMPS 



for Hire and Purchase. 

 LARGE ASSORTMENT of RUHMKORFF COILS and VACUUM 



TUBES. 

 PROFESSOR HUGHES' MICROPHONE. 

 ELECTRIC BELLS and INDICATORS. 

 TELEPHONES and TELEPHONE CALL BELLS, WIRE, &c., for 



Fixing. 

 EDISON'S ELECTRIC PEN i,Z is. 



ELECTRIC and MAGNETIC APPARATUS of all Descriptions. 

 Illustrated Catalogue Electrical Apparatus, Part i. Post free, 6 Stamps. 

 do do Electric Signals, Part 2. Post free, 6 Stamps. 



BARCLAY & SON, 



138, REGENT STREET, LONDON. 

 To Her Majesty and H,R,H, the Prince of Wales. 



DUPLEX LAMPS. 

 MODERATOR LAMPS. 



READING LAMPS. 



MICROSCOPE LAMPS. 



BEST COLZA OIL. 



A I KEROSINE OIL.' 



WAX, SPERM, 



AND 



PARAFFINE CANDLES. 



ILLUSTRATED CATALOGUES POST FREE. 



