/ 



:> ' 7fc 



A WEEKLY ILLLbiRAlhl) Jul RNAL OF SCIENCE. 



' ' To the solid groimcl 

 0/ Nature tiusts the mind which builds for aj/e."— Wordsworth. 



No. 1648, Vol. 64] 



THURSDAY, MAY 30, 1901. 



[Price Sixpence. 



Registered as a Newspaper at the General Post Office.] 



[All Rights are Reserved. 



NEWTON & CO.'S 



" DEMONSTRATOR'S " LANTERN, 



FOR LIMELIGHT OR ELECTRIC. 



With Prism for Erecting, 

 and for Vertical Projection. 



I'MCE £10 lOs. 



3 FLEET ST., M 



LONDON. •-•"" 



The most simple 



E.d efficient 



Si' g'.s Lantern 



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for general 



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NEW CATALOGUE 



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THE NEW 



LONDON" 



ICROSCOPE. 



Witli Eye -piece | inch, J inch 



Object ■ glasses, in Mahogany 



Case, 



£5 12s. 6d. 



Double Nose-piece, 9/- extra. 

 Focussing Substage, 14/6 extra. 



VERLAC VON CUSTAV FISCHER IN JENA. 



Soeben erschien : 



PHYCOMYCETEN UND 

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UNTERSUCHUNGEN AUS BRA81LIEN. ■ 



VON 



ALFRED MOLLER. 



Mit 1 1 Tafein und 2 Textabbildungen. Preis : 24 Mark. 



(Bildet zugleich das neunte Heft der " BOTANISCHEN 

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 gegeben von Professor Dr. A. F. VV. Schimper in 

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R. & J. BECK, Ltd., 



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Giving continuous Records 



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Invaluable to Invalids and 



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Illustrated Price List of Instruments fpee Dy Post to all.^ 



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NEGRETTI & 2 AM B R Aji^j j/ 

 38 HOLBORN VIADUCT, E.G. ,.y 



Rkanchf.- "YoRNHIl,I,.:.nJ ,„ RECENT STREET.- ^^ 

 AWARDED TWO GOLD MEDALS PARIS EXHIBITION 1900. 



