Eee EEKILY 
°° To the 
Of Nature trusts the 
ILLUSTRATED JOURNAL OF 
solid g 
mind which 
SCIENCE. 
rOuUna 
builds for aye.” —WorbDSWoRTH. 
No. 1412, VOL. 55] 
THURSDAY, NOVEMBER 1o, 1896. 
[PRICE SIXPENCE. 
Registered as a Newspaper at the General Post Office.] 
[All Rights are Reserved. 
INDUCTION COILs. 
APPS’ PATENTED INDUCTION COILS are now manufactured | 
concurrently by 
NEWTON & CO., 3 FLEET STREET, LONDON. 
«Xx? RAY PROcUS” TUBES, 25s. 
FLUORESCENT SCREENS, 35s. and 63s. 
Complete Apparatus for Réntgen ‘“‘X”’ Rays, with 
Coils and Fluorescent Screens, &c. 
Detailed List on Application. 
BECK’S MICROSCOPES. 
No. 25a.—THIS MODEL, with 
Two Eyepieces, and packed 
in Polished Mahogany Case, 
£6 10s. 
=n MODEL, with 
-in. Object Glasses, 
Two ‘Byenieres and packed 
in Polished Mahogany Case, 
£7 5s. 
No. 
. 29B. The erate of Abbe 
Condenser to 25B with Iris 
Diaphragm and Focussing 
and Swinging Adjustments, 
£8 15s. 
STAND No. 25. A 
FULL PARTICULARS FREE on APPLICATION to 
R. & J. BECK, LT0., 68 CORNHILL, LONDON, F.C. 
r-in. and 4-in. Object Glasses, | 
Be UNG. S 
“ec IRIS ” 
MICROSCOPE’ 
Is a superior instrument, well 
adapted for the Student’s use ; 
it is made entirely of Brass, and 
perfectly fitted ; it has a sliding 
body, drawer tube, fine adjust- 
| ment, A eyepiece, and 3% in. 
1 
and } in. objectives. 
£6 2s. 6d. 
PRICE - - 
Illustrated Catalogue post free. 
JOHN BROWNING, 
63 STRAND, 
LONDON, w.C. 
NEGRETTI & ZAMBRA’S 
'BINOCULARS AND TELESCOPES. 
“OFFICER OF THE WATCH” TELESCOPE, 
in use on all the vessels of H.M. Na 
| Makers of the ‘ 
Nickel-plated, covered with Brown 
eather. 
PRICE ... £2 10s, 
® Perrecr Derinition & Hich POWER, 
SIGNALLING” TELESCOPE. 
| 
| 
“ARMY 
£2 2s. 
As supplied by NEGRETTI & ZAMBRA to the War Office. 
Length, when closed, 11 inches. Combining high power and portability. 
NEGRETTI & ZAMBRA, 
SCIENTIFIC INSTRUMENT MAKERS to the QUEEN, 
88 HOLBORN VIADUCT, E.C. 
Branches: 45 CORNHILL; 122 REGENT STREET. 
ILLUSTRATED Prick Lists FREE By Post. 
