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^^^-^^' 



A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



" To the solid ground 

 Of Nature trusts the mind which huilds for aye." — Wordsworth. 



No. 2240, VCL. 90] 



THURSDAY, OCTOBER 3, 1912 



[Price Sixpence 



Registered as a Nevj-spaper at the General Post Office.] 



[All Rights Reserved. 



INDUCTION COIL 



NEWTON & WRIGHT, Ltd. 



(Late Electrical Department of Newton & Co.), 

 72 WIGMORE STREET, LONDON, W. 



WRITE FOR ILLUSTRATED CATALOGUE. 



FuLi, Partic 



R. & J. BECK, 

 68 Cornhill, E.C 



The Handle 

 London Model. 



This is a new model, in which 



the limb is made so as to form 



a convenient handle for lifting 



the microscope. Otherwise it 



is similar to the ordinary 



London model. 



No. 1325. Stand, in case, 

 £3 5 6 



No. 1329. Stand, incase, 

 with spiral focussing 

 substase 



N0.364A, Eye- 

 piece 



No. 801. Srds 

 Object Glass 



No. 803. Jth 

 Object Glass 



TANGENT 

 GALVANOMETER 



(9389)- On one side of the circle three separate windings of 

 ID turns each of No. 24 D.S.C. copper wire, the diameter of each 

 is 4^' in., 7=2 in., and loj in. 

 respeciively ; on the oiher 

 side of ihe circle three wind- 

 ings of the same diameter, 

 but with twice the number of 

 turns of wire, viz., 20 lurns 

 each. Each of the winding 

 ends has a pair of terminals 

 fixed on Ihe circle. A small 

 ebonite tablet fixed under 

 each pair of terminals 

 states the particulars of the 

 windings connected to those 

 terminals. Agate centre to 

 magnetic needle in brass case, polished teak base, £4 0_0 

 (EXTRACT FROM NEW PHYSICAL LIST.) 



BAIRD & TATLOCK (London), LTD., 



14 Cross Street, Hatton Garden, London, E.C. 



•o«o*o«o«o«oa 



3»0*0*0*0*0*0*i 



INEGRETTI & 



I "Hyetograph" 



II is a Recording 

 II Rain Gauge that 

 'i is approved by 

 SS the highest rain- 

 ed fall authorities. 

 I Price = £6 15 



SS Illuslraled Price List of 

 •o Recording &other Rain 



*• Gauges sent post free. 



•o 



So 38 Holborn Viaduct. 



SS London, E.C. 



S§ 45 Cornhill, E.C. , 



•° 122 Regent St., W. 



ZAMBRA'Si 



