A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



Of Katur 



" To the solid ground 

 ,ustz the mind which builds for a/«."— Wordsworth. 



No. 1658, Vol. 64] 



THURSDAY, AUGUST 8, -1901- 



' ' Registered as a Newspapsr at the General Post Office.] 



[Price Sixpence. 



[All Rights are Reserved. 



iNEWTON & CO.'S GARDEN SUN-DIALS. ' NEW PHYSICAL LABORAmYJABLES 



OPTICIANS TO HIS IVIAJESTY THE KING ANU GOVERNMENT. 

 :• FI.F. ET STREET. LONDON. 



THE NEW 



"LONDON" 



MICRO SCOPE. 



With Eye -piece | inch, \ inch 



Object - glasses, in Mahogany 



Case, 



£5 12s. 6d. 



Double Nose-piece, 9/- extra. 

 Focussing Substage, 14;6 extra. 



REYNOLDS & BRANSON, Ltd., 



Manufacturers of Laboratory Fittings and every description 



of Scientific Apparatus. 

 Estimates and] LEEDS. [Catalogles Free. 



I«EGR.ETTI SC ^.A.IVIBIS'.A.'S 



NEW PATTERN COMBINED 



BARO-THERMOGRAPH, 



iving tliii^ ^'W .neand the 

 ; pressure and temperatui 



Recording Baro 



chart 



R. & J. BECK, Ltd., 



1 _ 68 CORNHILL, 



The ahove instrument .. .ml lUi.;-* 

 meter and Recording Thermometer, 

 continuous records of the atmosphe 



"///wi/mtoZ/'-Av list! cf SclcKtiflc Inslrinnents free ly fast to alt /-arts 



<,ftlu 



■rid. 



NEGRETTI & ZAKIBRA, 

 38 HOLBORN VIADUCT, E.G. 



Branched : 4^ CORNHILL. r.n<l i:2 REGENT STREET. 

 AWARDED TWO GOLD MEDALS PARIS EXHIBITION 1900. 



