^ 



A WKEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



•'To the solid ground 

 Of Nature trusts the mi.ui which builds for .j,.. "-Wordsworth. 



=^:::^j^=;r^^^^^^^^^^^^^=.^=^.^^^L^^^ 



RegUteicd as a Newspaper at the General Post OnTic 



[All Rights are Reserved. 



THE BEATING OF THE HEART | 

 THE MOVEMENTS OF THE DIAPHRAGM 



Can l,e see.i by the aid of the Special " Focus "Tubes (25. 



each) and the Kluorescenl Screens (35^- each) ntade by 



NEWTON & CO.. 3 Fleet Street, London, .f used wuh 



one of their 6-inch Induction Coils. 



NEWTON & CO.j 3 FLEET STREET, LONDON, 



Are now prepared to supply the vyell-known '' F«™^ " p^es 



manuficttired by them at the reduced price of 25S. each. 



These Tubes are still unsurpassed for Rapidity, Brilliancy, 



and Definition. ,.111.. 



When ordering, the length of Spark to be used, should be 



'"An°ihe' Tubes for 6" Spark and upwards will work right 

 through the human body, showing the heart, liver, spine, ribs, 

 movements of the heart, diaphragm, &c. 

 Customers can see these Tubes at work at 3 Fleet Street, 



LoNli.)N. 



NEW FLUORESCENT SCREENS, extremely brilliant, 

 8' X 5", 35s. each ; 10 > . 0.5s. eacn. 



No Scientific Man j 



should 



be without a 



FRENA 



CAMERA. 



fM particulars 



free 



on application. 



THE EYE 



Anatomically represented in a Coloured Sectional Chart, with 

 explanatory text. 



By OR. RENLOW. 



Revised and Edited, «.th an Introduction on Eyesight, by 

 JOHN BROWNING, F.R.A.S., F.R.M.S., 



President of the British Optical Association, &c. 



PRICE 2s. bd. NET. 



Sent, Post Free, for 2s. 6d., by 



MR. JOHN BROWNING, 



OPHTHALMIC OPTICIAN, 

 63 STRAND, LONDONjJW^ 



NEGRETTI & ZAMBRA'S 



Nickel-plated, covered with Brown 



Leather. 



PRICE ... *2 10s. 



I'EKFECT Definition & High Power. 



,K^V SIGNALLING" TELESCOPE. 



£2 2s. 



R.&J.BECK,LW, 68 CornMll, London, E.C. 



£2 2s. 



,. J 1, MC<-RFTTI & ZAMBRA to the War Office. 

 As supplied by NEGRETTI *^;^^«;^.^^g ^;^,, p„,,„ ^„a portabihty. 



Length, when clo.«,..^ & ZAMBRA, 



Branc^h!s "2 CORnJ?iUV;'i22REgInT STREET. 



