NA TURE 



I 



All other air 

 pumps superseded. 





THE, 



"GERYK" 



(Fleuss Patent) 



Vacuum Pump. 



R.esults hitherto only pos- 

 sible with mercury pumps 

 are readily obtainable by 

 the " GeryR." Used by 

 all leading scientists. Far 

 more rapid than any other 



vacuum pump. 

 Price from Write for 



84 : 5 : 0. LIST F.45. 



puUometet engineering Q2Xi 



' ma* einu iromvoThs. Reading, 



KAHLBAUM'S 

 CHEMICALS 



Sole Dep&t: 



JOHN J. GRIFFIN & SONS, 



LIMITED, 



' SARDINIA STREET, 



LONDON, W.C. 



Telegram and Cable Address: 

 "GRAMME, LONDON." 



[August 3, 1905 



SELF-REGISTERING 

 SELF-RECORDING 



(ELECTRICAL) 



RAIN 

 G AUGES . 



THE 'WILSON' 



SELF-REGISTERING 



RAIN GAUGE. 



The 'WILSON' 



SELF-RECORDINfi 



ELECTRICAL 



RAIN GAUGE. 



Records aiilo- 

 matically on a 

 Weekly Chart. 



.IMF B£ OBTAIiVED THROUGH ANV OPTICIAN. 



If any difRculty be found in 

 through your Dealer kindly cot 



PASTORELLI & RAPKIN, 



(Established 1750), LTD. 



Contractors to H. A/. Government, 



46, HATTON GARDEN, LONDON, E.C. 



Telephone \o. igiii, Holborn. Telegrams— "Rapkin, London." 



Actual (Wholesale) Makers of all kinos of Meteobolocical Instruments. 



REYNOLDS & BRANSON, L™. 



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" ■ 12", and with Adapters to suit 

 any smaller plate ; complete, *l : lo : O 



This arrangement is specially recommended to Radiographers and other 

 Scientific Photographers. 



Tank to hold 1 doz. J plates only */6 each. 



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



Tank to hold 1 doz. * plates only 6/- „ 



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



HiVJ PHOTOGRAPHIC PRICE LIST, 25th EDITION, ON 

 APPLICATION. 



14 COMMERCIAL STREET LEEDS. 



