A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 
“To the solid ground ‘ 
Of Nature trusts the mind which builds for aye.’,—WorpswortH. 
No, 2234, VOL. 89] 
THURSDAY, AUGUST 22, 1912 
Registered asa Newspaper at the General Post Office.] 
NEWTON & COWS 
NEW MODEL 
ASTRONOMICAL 
TELESCOPE. 
Complete with 34 in. object 
glass, 2 eyepieces, finder, &c., 
on altazimuth stand. 
Complete, 
£15 
King. 
By Royal Warrant to H.M. the 
72 WIGMORE STREET, LONDON, W. 
““Newtobar, London.” 
Established over 200 Years Telegrams: 
BECK’S FOCOSTAT LENS 
(HISCOTT’S PATENT). 
This lens fits on to the handle or a Dissecting Instrument, 
Mapping Pen or Needle, and when once set is always in focus 
(focostat). Those who have hitherto used a watchmaker's eye- 
glass or a lens on a stand will appreciate the advantage of this. 
Being fixed on the instrument itself, it is always in focus, as it 
moves with the instrument. It is invaluable to the Botanist, 
Entomologist, Zoologist, and the Draughtsman. 
Ss. a. 
For Botany and Dissecting, complete with Needle ’ 5 6 
” » ” re 1 59 1» and two special 
Scalpels with fine pointed Blades aed 96 
Draughtsmen, complete with Mapping Pens i aS 
. *s 6 
R. & J. BECK, Ltd., 68 CORNHILL, LONDON, E.C. 
[All Rights Reserved. 
EYNOLDS & BRANSON, Ltd., 
Chemical and Scientific Instrument Makers to His Majesty’s 
Government (Indian, Home, and Colonial), Laboratory 
Furnishers and Manufacturing Chemists. 
‘‘Rystos”” Bench, 
showing bottles 
with enamelled 
labels on eachside. 
One set of bottles re- 
quired for each four 
Students as supplied 
to the Modern School, 
Bedford, &c. 
CHEMICAL, PHYSICAL, and TECHNICAL LABORATORIES 
Fully Equipped with BENCHES, FUME CHAMBERS, &c. 
INSTITUTIONS EQUIPPED 7-— 
The Girls’ High Schools at Barnsley, Beverley, Doncaster, Leeds, Nuneaton 
and York; Radley College, Oxford ; The Schools, Shrewsbury ; Wellington 
College, Berks; St. Mary’s College, Winchester; the New Science 
Laboratories at the Grammar School, Dunstable ; Laboratories at Messrs. 
Brunner, Mond & Co., Ltd., Northwich, Cheshire ; the National Physical 
Laboratory, Teddington ; Transvaal Dept. of Agriculture ; (Experimental 
Farm), South Africa ; The Technical School, Morley ; and many others. 
Catalogue of Chemical and Physical Apparatus and Chemicals, 550 pp. 
and 1,500 Illustrations, post free on application. 
Designs of Benches and Fittings to suit all requirements. 
|14 COMMERCIAL STREET, LEEDS. 
Student Equatorial 
.Telescope 
«with 3-inch object glass, and circles 4 inches diameter 
divided on brass, the hour circle reading to 1 minute, the 
declination to 5 minutes, Complete in pine case, with 
3 eyepieces. 
Ttlustrated List 
of Telescopes 
yree on 
aS 
request, 
NEGRETTI 
& ZAMBRA, 
Holborn Viaduct, 
London, E.C. 
Branches : 
45 Cornhill, E.C. 
12z Regent St., W. 
