AMNH LIBRARY 



VI 11 



SCIENCE-GOSSl 



100164821 



JOHN J. GRIFFIN & SONS, LTD., 



Chemical, Philosophical, and Photographic Instrument Makers. 



MAKERS TO THE ADMIRALTY. WAR DEPARTMENT, INDIA & COLONIAL GOVERNMENTS. 



Physical and Chemical Apparatus of Every Description. 



HOLLOWAY'S PATENT GAS FURNACE 



WITH GRIFFIN'S RADIAL BURNER. 



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



CHEMICAL NF.U'S, September 23* tSqS, />. 137 :— "Suitable for all the ordinary work of a laboratory, the 

 various improvements in its construction also greatly facilitating the work done with 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. 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, & io, Hatton Garden, London, 



SCIENTIFIC INSTRUMENT MAKER TO THE WAR OFFICE, 

 INDIA OFFICE, ADMIRALTY, &c. 



IS SOLE MAKER OF THE NEW 



PATENT 



'- c "W-A-TIKIIsr " 



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 tin's Instrument, 

 which is described at length by Mr. WHYMPER, 

 the distinguished" Alpine climber, in the 

 " Times" of December 17, 1S98. 



It is made in Aluminium for lightness, in 

 either 3-inch or 4.^-inch sizes, with Sling 

 Leather Case. pKlcEs . 



Scale to Scale to 



5,000 feet . . £5 5s. 15.000 feet . . £5 

 10,000 ,, . - £5 10S. 20,000 ,, . . £6_ 



I5S. 

 OS. 



HICKS'S famous Student's MICROSCOPE 



( Right-hand Illustration J 



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



long, 1 Objective dividing j, \ and 1 inch, Coarse and Fine Adjustment, Liv 



Ca°"e, Forceps and Condenser, in neat Mahogany Cabinet, with Kick 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 Butolpm Press, Limited, Sweedland Court, Bishopsgate Street, and Middlesex Street, E.C. 



