5 CIENCE-GOSSIP. 



JOHN J. GRIFFIN & SONS, LTD., 



Clieniical, Philosophical, and Photographic Instrument Makers. 



MAKERS TO THE APMIRALTV. WAR DEPARTMENT. INDIA <S- COLONIAL GOrERNMENTS: 



Physical and Chemical Apparatus of Every Description. 



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HOLLOWAY'S PATENT GAS FUKNACE 



"WITH GBUTIN'S RADIAL BURNER. 



Most Powerful and Reliable, NO BELLOWS! NO GAUZES! NO SMOKE! 



CHFMIC^L \hn "i Septemht-r 23, /SgS, />. 157 :— "Suitable for all the ordinary work of a laboratory, the 

 \anous improM-ments in its construction also g-reatly facilitating" tlie work done with it." 



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This Furnace, in addition to its cheapness, possesses several advantages over other reverberatory laboratory gas furnaces. The 

 body is separate from the base, which extends forward, and forms a convenient stand for hot crucibles, etc.. and for the furnace doors. 

 The material of which it is made is such that althoug-h. like all internally-fired g-as furnaces, it will crack, the crack is usually a single 

 one, which can be readily closed up if desired, with fireclay. 



Full particulars of above, or complete General Catalogue, on application. 



20-26, SARDINIA STREET, Lincoln's Inn Fields, LONDON, W.C. 



JAMES J. HICKS, 8,9,& 10. Hauon Garden, London, 



SCIENTIFIC INSTRUMENT MAKER TO THE WAR OFFICE, 

 INDIA OFFICE, ADMIRALTY, &c. 



IS SOLE MAKER OF THE NEW 

 PATENT 



MOUNTAIN ANEROID BAROMETER. 



The only Aneroid that can be thrown in and 



out of action as required, and which, when 

 out of action, is absolutely impervious to the 

 influence of variations in atmospheric pres- 

 sure. Travellers and Surveyors will now be 

 able to ascertain correct altitudes owing to 

 the marvellous accuracy of this Instrument, 

 which is described atlength by Mr. Wm'MPiiR, 

 tht^ distinguished Alpine climber, in the 

 " Times" of December 17, i8g8. 



It is made in Aluminium for lightness, in 

 either 3-inch or 4^-inch sizes, with SHng 

 Leather Case. ^^^^^^, 



Scale to Scale to 



5,000 feet . . £5 5s. 15,000 feet . , £5 

 £6 



■ £5 5s. 15,000 feet . 

 £5 los. 20,000 ,, . 



15s. 



OS. 



HICKS'5 famous Student's MICROSCOPE 



( Right-hand Illustration) 



With A E\"epiece, Double Mirror, Brass Slipping Stage, Sliding Draw Tube 2 in. 



long, I Objective dividing \. \ and 1 inch. Coarse and Fine Adjustment, Live 



Cage, Forceps and Condenser, in neat Mahogany Cabinet, with lock and key. 



Price, £3 15s. Ocl, 



MAKER of all kinds of 5tandard Barometers and Thermometers. 



Illustrated Price Lists FREE <^\\ Application. 



London : Pnnted b>- the Botoi.ph PrilSS, L!MIti;d, Sweedland Court, Bishopsgate Street, and Middlesex Street, E.C. 



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