June 19, 1879] 



NATURE 



Ixiii 



CHEMICAL & PHYSICAL APPARATUS 



BOTTLES, PURE CHEMICALS, 



And every requirement for Science Classes, Private Study, or Business 



Purposes. 



Illustrated Priced Catalogues post free for six stamps. 



Carriage allowed to any station in England or Wales, on orders of 401. 

 value and upwards. 



MOTTERSHEAD AND CO. 



7, EXCHANGE STREET, & 10, HALF MOON STREET, 

 MANCHESTER.- 



DRAPER'S INK (DICHROIC). 



THE NEW BLACK INK 



DIFFERING FROM ANYTHING ELSE EVER PRODUCED. 

 Writing becomes a pleasure when this Ink is used. It has been adopted 

 by the principal Banks, Public OfBces, and Railway Companies throughout 



Ireland. 

 It writes almost instantly Full Black. I Flows easily from the Pen. 

 D»es not corrode Steel Pens. Blotting-paper may be applied at the 



Is cleanly to use, and not liable toBIot. 1 moment of writing. 



Can be obtained in London, through Messrs. B\rci.ay & Sons, Farring- 

 don Street; W. Edwards, Old Change; F. Newbery & Sons, Newgate 

 Street ; Wm. Mather, London and Manchester ; /. Austin & Co., Duke 

 Street, Liverpool ; and Stacy & Cook, Paternoster Row ; and to be had ol 

 ftll Stationcss. _ . ,. 



BEWLEY & DRAPER (Limited), Dublm. 



BARCLAY & SON, 



138, REGENT STREET, LONDON. 



7> Her Majesty and H.R.H. the Prince of Walts. 



DUPLEX LAMPS. 

 MODERATOR LAMPS. 



READING LAMPS. 



MICROSCOPE LAMPS. 



BEST COLZA OIL. 



A I KEROSINE OIL. 



WAX, SPERM, 



AND 



PARAFFINE CANDLES. 



ILLUSTRATED CATALOGUES POST FREE. 

 ELECTRICAL, SCIENTIFIC, & PHOTO- 



GRAPHIC APPARATUS.— Electric Bells, Fire ard Thief Alarms, 

 and Automatic Switches. Induction Coils, Frictional Machines, Lamps, 

 and Batteries. Microphones, Wires, Magnets, Carbons, and all Mate- 

 rials. Repairs and Alterations. New Illustrated Descriptive CataKtgue, 

 •ne Stamp. Cameras, Dry Plates, Sensitive Paper, and all Chemicals. 

 Photo. List free.— DALE & CRAMPl'ON, Manufacturing Opticians, 

 4, Little Britain, London, E.C. 



The LANCASTER POCKET CAMERA 



for plates 4} X 3j inch, having three double dry.plate Slides. Umbrella 

 Stand, best Lens with plate of Diaphragms, &c., &c., .£5. Particulars 

 free. 



The LANCASTER CARTE PHOTOGRA- 

 PHIC APPARATUS, with Chemicals, &c., &c, complete. ^3 jr. 

 FIRST yUALlTV ASTRONOMICAL TBLESCOPES with Oliject 

 Lenses, by Wray, al-inch, /s or. ; aj-inch, Cl ro*- : sj-inch, Zio ; 

 3-inch, ;tij lor. ; 3j-inch, £1515^.: 4-inch, £,ii; 4l-inch, ;C4o; 

 5-inch, ^55, &c. Capital Student's Microscope, {.-^ j». Collegian's 

 First Quality Microscope, Z< S*- Illustrated CaUli gue, 3 Stamps. 

 J. LANCASTER & SON, Opticians Birmingham. 



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 quality and finish, at the most moderate prices. 



Piice List post Jree. Engine Divider to the Trade. 

 ADDRESS- 

 GREAT TURNSTILE, HOLBORN, LONDON, W.C. 



THE MINIATURE MICROSCOPE LAMP 



(REGISTERED) 

 PRICE 141. PORTABLE TIN CASE FOR DITTO, sj. M. 



JAMES HOW & Co., 



SCIENTIFIC INSTRUMENT MAKERS, 



5, ST. BRIDE ST. i!aU s, Foster Lant\ LONDON. ■ 



HORNE'S POMPEIAN DECORATIONS. 



ROBERT HORNE, 



HOUSE DECORATOR and PAPER-HANGING 



MANUFACTURER, 



41, GRACECHURCH STREET, LONDON, E.C. 



By Special Appointment to His Majesty the King of Italy. 



0. TISLEY* Co. 



OPTICIANS. ' 



17a, BROMPTON ROAD, S.W. 



(Close to South Kensington Museum). 



THE PHONEIDOSCOPE 



An Instrament for Observing the Colour-Figures of Liquid Films under the 

 action of Sonorous Vibrations, 



Beine a visible demonstration of the Vibratory and Molecular Motion of a 

 Telephone Plate. 



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

 Pamphlet, &c., in Cardboard Box, rot. 6d. 



HANUFACTtlRED AND SOLD WHOLESALK AND RETAIL BY 



S. C. TISLEY & CO., 172, BROMPTON ROAD, LONDON, S.W. 

 TELEPHONIC ELECTRICITY. All Materials supplied for experi- 

 mental purposes. 

 Price Litts of Electrical and Acoustic Ap^nttus, with Drawings and 

 Description of the Harmcntfraph, Post Free, id. 



HOILOWAYS OINTMENT 



A CERTAIN 



REMEDY 



For BAD BREASTS, OLD WOUNDS, and SOKES. If 

 effectually rubbed on the Neck and Chest, it cures SOBS 

 THUOATS, BRONCHITIS, COUGHS and COLDS; and for 

 GOUT, RHEUMATISM, aid all Slda Diseases it is unequalled. 



GARDENING ILLUSTRATED: a new 



Weekly Journal for all interested in Gardening in Town or Country. 

 Price 1/ weekly. Profusely Illustrated. Flowers. Fniits, Vegetables. 



for twelve months for 6j. &/. Specimen copy, ijrf. in sumps. 

 37, Southampton Street, CoTcnt Garden, London, W.C. 



OlBce, 



