NA TURE 



[July 6, 1905 



REYNOLDS & BRANSON, P j, sbnSaTd'barometTr 



RYSTOS 

 STAND 

 DEVELOPING 

 TANK. 



Fop Developing plates or 

 cut films slowly in a very- 

 weak developer. 

 Clean in use; gives excel- 

 lent results with a minimum 

 of trouble. 



MADE OF STOUT 



POLISHED COPPER. 



Tank to take 6 plates 15" x 12", and with Adapters to suit 

 any smaller plate ; complete, *:i : lO : O 



This arrangement is specially recommended to Radiographers and other 

 Scientific Photographers. 



Tank to hold 1 doz. J plates only 



Tank to hold 1 doz. 5" x 4'" plates only 5/- 



Tank to hold 1 doz. i plates only 6 - 



Postage on any of above three sizes, 4d. extra. 



4,6 each. 



HEW PHOTOGRAPHIC PRICE LIST, 25th EDITION, ON 

 APPLICATION. 



(Rci. No. 42o,2g7.) 

 This Instrument has been designed to meet the re- 

 quirements of Students and others who find the need of 



a Barometer which will give exact readings, and 

 cost but a moderate sum. 



It appeals especially to Colleges and Schools for 



The construction is on that of the well-known " Fortin " 

 principle. _ The level of the cistern mercury is reducible 

 exactly the same manner as in the more 



■xpensiv 

 The d 



for 

 imeter of the mercurial column is "25 inch, and 

 a bold, well-defined reading. The scales, by 

 if the double vernier, are capable of being read 



ch and 



lilli 



nted 



, well- 



14 COIVIIVIERCIAL STREET, LEEDS. ■ 

 The New Manifolding 

 Hammond Typewriter, 



A Hammond Typewriter will do anything any other 

 typewriter does ond do it better. "Beside, it has 

 twenty exclusive features, not one of which is possessed 

 by any other writing machine. 



IVH}' is I hi- Haininond t/ic Best .Machine for 

 Sleiipgraphers ? 



BECA USE 



Perfect and Permanent 



Alignment, 

 Work in Sight. 

 Manifolding, 

 5peed, 

 Durability, 

 Noiselessness, 

 Interchangeable Type, 

 Light Elastic Touch, 

 Perfect Paper Feed, 

 Any Width Paper, 



are essential requisites, and the Hammond 



possesses them all. 



On account of the TYPE being interchangeable, it is most 



useful to SCIENTIFIC work. 



Call and test Machine or write for Catalogue, free on appli- 

 cation to : — 



The Hammond Typewriter Co., 



50 QUEEN VICTORIA ST., E.G. 

 Manchester Branch; 164 DEANSOATE, MANCHESTER. 



pntished, solid mahogany board, with plates for attach- 

 in- nt 10 wall, opal glass reflectors for reading off, and 



it-ws for vertical adjustment. 



I'tie metal portions are all well bronzed and lacquered, 

 .u.d the scales are silvered brass. 



We confidently recommend this Instrument for use as 

 a "Standard" in Colleges and Schools, private Observa- 

 tories, and by Gas and other Engineers. 



Price, complete, mounted as illustrated, 



£3 7 6 each, 



or ni.-iy be had with one scale (either inches or milli- 



metres), and witli thermometer on other scale, at same 



price. ..„-a 



ID*" Nature says: — "Provides an accurate instru- 

 ment at a moderate cost." 



FULL SirE STANDARD BAROMETER of 



same design, bore 0-5" diameter, inches and millimeter 

 scales, verniers reading to o'ooz inch and o'l m/m, on 

 polished mahogany board with brackets and opal glass 

 reflectors, £7 10 O 



Sole Manufacturers and Proprietors of the 

 Registered Design. 



PASTORELLI & RAPKIN, Ltd., 



46 HATTON GARDEN, LONDON, E.C. 



Wholesale Makers of all kinds of Meteorological Instruments. 



Contractors to H.M. Government. Estd. 17TO 

 Telegrams, " Rapkin, London." Telephone, ipSi Holborn 



KAHLBAUM'S 

 CHEMICALS 



Sole Depot : 



JOHN J. GRIFFIN & SONS, 



LIMITED, 



SARDINIA STREET, 



LONDON, W.C. 



Telegram and Cable Address; 

 "GRA.MME, LONDON." 



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