JX NAN SEN IOEIEIUS 1 RVG END) 
JOURNAL OF SCIENCE. 
“To the solid ground 
Of Nature trusts the mind which builds for aye.’—Wordswortn. 
No. 1414, VOL. 55] 
THURSDAY, DECEMBER 3, 1806. 
[PRICE SIXPENCE. 
{All Rights are Reserved. 
Registered as a Newspaper at the General Post Office.] 
INDUCTION COILS. | 
| 
APPS’ PATENTED INDUCTION COILS are now manufactured | 
concurrently by 
NEWTON "LEET STREET, LONDON. 
& CO.,;3 1 
ip Ne ~ 
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inn 
““X” RAY “FOCUS” TUBES, 25s. _ 
FLUORESCENT SCREENS, 35s. and 63s. 
Complete Apparatus for Réntgen “ X”’ Rays, with 
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Detailed List on Application. 
No Scientific Man 
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FRENA 
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Full particulars 
st 
) | 
adapted for the Student’s use; 
“it is made entirely of Brass, and 
BE @wy ON NGe 4s 
CS OS oe 
MICROSCOPE 
Is a superior instrument, well 
perfectly fitted ; it has a sliding 
body, drawer tube, fine adjust. 
ment, A eyepiece, and 3 in 
and } in. objectives. 
£6 2s. 6d. 
PRICE - 
Lllustrated Catalogue post free. 
JOHN BROWNING, 
63 STRAND, 
© NEDO NN, WV iG. 
| CHRISTMAS PRESENTS. 
ema 
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BAROGRAPHS AND_THERMOGRAPHS. 
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The Barograph is fitted in a Mahogany Case with Glass Front, as shown 
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instruments. Price of each, with supply of Charts for one year, £6 10s. 
NEGRETTI & ZAMBRA, 
SCIENTIFIC INSTRUMENT MAKERS TO THE QUEEN, 
38 HOLBORN VIADUCT, E.C. 
hes—45 CORNHILL, and 122 REGENT STREET. 
Branc 
