i 
— 
“Ans ONAN Ins 
Les 
MAY 27 
A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 
“To the solid ground 
Of Nature trusts the mind which builds for aye.’-—WoORDSWORTII. 
No. 2220, VOL. 89] THURSDAY, MAY 16, 16, 1912 mr [PRIcE SIXPENCE 
REYNOLDS & BRANSON, Ltd., 
Chemical and Scientific Instrument Makers to His Majesty’s 
Government (Indian, Home, and Colonial), Laboratory 
| Furnishers and Manufacturing Chemists. 
: The “RYSTOS” 
CONDUIT DEVELOPING 
TANK. 
(REGD.) 
Registartdias asa 1 Newsp: aper at Hie General P Post O Offite. ] (All Rights | Reserved. 
For use when developing 
photographic plates by the Time 
or Stand Method, with conduit 
for circulating the developer by 
inclining the tank at intervals, 
thus preventing uneven develop- 
ment. With light-tight lid and 
Simple Cyroscopes 
from 10/6 tt : 
T elegrams : “ Newtob ar, removab'e rack. 
SOndoneg Size Price in Copper Price in’ Ger. Sil. 
Established 2 Lpl. ... To hold 6 or 12 9/- 11/- 
over 200 Years. <_<) > ; plates back to back. 
tS 5 in 4 in Do. 39/6 11/6 | Post 
Illustrated Price List of Gyroscopes 54 AU gehen Ae Do. 3/6 “ 11/6 | Free 
to be had post free from t roe a 3h as : é He es 2 a 6 See 
84 in. X 64 in. Do. r s « ia 
NEWTON 6& CO., Opticians to H. M. King Baie V. Other sizes at proportionate prices. 
72 WIGMORE STREET, LONDON, W. New Catalogue, 104 pages, past free on application 
14 COM MERCIAL STREET, LEEDS. 
\ 
THE HANDLE 
LONDON MODEL. 
The very best 
Binocular for 
This is a new model, in which Naturalists 
the limb is made so as to form 4 a 
a convenient handle for lifting | is the 
the microscope. Otherwise it > ‘“ Folding Minim ” 
is similar to the ordinary 
London model. 
No. 1325. Stand, incase, 
£3 5 6 
No. 1329. Stand, inease, 
with spiral - focussing 
| . . . . 1 
| which is easily carried in the breast pocket. 
The Rev. H. Carter, of Needham Market, states 
“The ‘Folding Minim’ is admirably aljapted for watching birds, and 
n one can carry it so easily tat it is seldom likely to be left at home. T he 
power of 5.5 is quite sufficient, and the field very wide for the size. 
Full description and price- free on request. 
substage .. 4 Q O 
No. 364A, Eye- ec Negretti & Zachos 
piece ... i. 5 Ox« 
Holborn Viaduct, London, E.C. 
45 Cornhill, E.C.; 122 Resa) St., W. 
Tlustration 
are one-third 
No. 801. #rds 
Object Glass 12 0 
No. 803. ith 
!Object Glass 110 O 
Fut ParTicuLaRs oF 
R. & J. BECK, 
68 Cornhill, E.C. 
