A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



" To the solid ground 

 Of Nature trusts the mind which builds for aye." — WORDSWORTH. 



No. 2767, Vol. no] SATURDAY, NOVEMBER 11, 1922 [Price One Shilling 



Registered as a Newspaper at the General Po.-t Office.] [All Rights Reserved. - 



BALANCES & WEIGHTS 



SPECTROMETERS 



^M@ 



, h 



Particulars and Prices on application to — 



JOHN J. GRIFFIN & SONS, L™ 



Kemble Street, Kingsway, 



London, W.C.2. 



REYNOLDS & BRANSON, Ltd. 



LABORATORY FURNISHERS AND MANUFACTURING CHEMISTS. 



Balance, Analytical, Rystos 



New Model. Improved vertical 



movement of rider hook, rider scale 

 running from end to end of beam and 

 plumb line. The bearings are agate 

 throughout ; the beam of hard 

 magnalium. Base of black crystal. 

 Mahogany case with counterpoised 

 front, hinged side doors and sliding 

 back and brass levelling strews. To 

 carry 200 grammes, sensitive to £th 

 milligramme, or 1 1 , h th milligramme 



vith a less load £: 



i M 



■ 7,/ repaired in oar own Workshops. 

 For Analytical and other Balances and Weights, see special Catalogue. 

 ' Catalogues of Chemical and Physical Apparatus. 

 Post Free on request. 



14 Commercial Street, Leeds. 



HAIR 

 HYGROMETERS 



for reading the percentage 

 of moisture. Write for de- 

 tails of our latest patterns. 

 For Laboratories, Cold 

 Stores, Drying Chambers, 

 etc. 



Negretti © Zambra 



38.HOLBORN VIADUCT. E.C.I. 

 LONDON. 



