AMNH LIBRARY 



100164822 



SCIENCE-GOSSIP. 



JOHN J. GRIFFIN & SONS, LTD,, 



Chemical, Philosophical, and Photographic Instrument Makers.-; • " 



MAKERS TO THE ADMIRALTY. U'.-iR DETARTMENT. INDIA &- COLONIAL GOVERN^tEHTS^ 



Physical and Gheiviical Apparatus of Ever y Description, 

 holloway's patent gas furnace 



WITH GRIFFIN'S RADIAL BURNER. 



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



CHEMICAL A'EirS, Septimbei' 23, iSl)S, p. 157 :~" Suitable for all the ordinary work of a laboratory, the 

 various iniprovetnents in its construction also greatly facilitating' the work done mth it." 



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 although, like all internally-fired gas furnaces, it will crack, the Crack is usually a single 

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



FUU 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, Hatton 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. Tra\ellers and Surveyors will now be 

 able to ascertain comect altitudes owing to 

 the marvellous accuracy of this Instrument, 

 which is described at length by Mr. Whyaeper, 

 the distinguished Alpine climber, in the 

 " Times" of December 17, 1898. 



It is made in Aluminium for lightness, in 

 either 3-inch or 4J-inch sizes, with Sling 

 Leather Case. 



Scale to 

 5,000 feet , 



£S5S. 



£5 I OS 



PRICES : 



Scale to 

 15,000 feet . . £5 

 20,000 ,, . . £6 



5S. 



OS. 



HICKS'S famous Students MICROSCOPE 



( Rigkt-Jiand I ilusf ration) 



With A Eyepiece, Double Mirror. Brass Slipping Stage. Sliding Draw Tube 2 in. 



long, I Objective dividing i. -j and i inch. Coarse and Fine Adjustment. Live 



Cage, Forceps and Condenser, in neat iNIahogany Cabinet, witli lock and key. 



Price, £3 15s. Od. 



MAKER of all kinds of Standard Barometers and Thermometers. 



Illustrated Price Lists FREE on Application. 



London : Printed by the BoTOl.PH Prkss. LrSliTKn. Sweedland Court. Bishopsgate Street, and Middlesex Street, E.C. 



