

A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



" To the solid ground 

 Of Nature /rusts the mind which builds for aye." — Wordsworth. 



BALANCES & WEIGHTS 



SPECTROMETERS 



jpr^i 



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 

 riingnalium. Base of black crystal. 

 Mahogany case with counterpoised 

 front, hinged side doors and sliding 

 ba< k and brass levelling screws. To 

 carry 200 grammes, sensitiv. to £th 

 milligramme, or T Vh milligramme 

 with a less load ,£14 14 o 



Balance* renovated and /■/.. it 'd in our own Workshops, 

 For Analytical and other Balances and Weights, see special Catalc 

 Post Free on request. 



14 Commercial Street, Leeds. 



BAROGRAPHS 



Four rubber feet to the base 

 — a self - adjusting pen arm — 

 a supporting rod to the cover — 

 these are some of the refinements 

 on our Recording Barometers. 

 Write for price list ** B. 3.'* 



%gb#F#Zambra 



38,f10LBURN VTADUCT. E.C.I. 

 LONDON. 

 FA^Q^Y : H.VLF-MOQN 

 w o r s k4/'o n aMkNBBURY. 



