Pe\WEEKLY TEEUS@PRATED JOURNAL OER SCIENCE. 
“© To the solid ground 
Of Nature trusts the mind which builds for aye.”—\VWORDSWORTH. 
No. 1553, VOL. 60] THURSDAY, AUGUST 3, 1809. [PRICE SIXPENCE. 
Registered as a Newspaper at the General Post Office.] ey Rights are Reserved. 
SUN-DIALS ‘ON PEDESTALS. |GHEMICAL & SCIENTIFIC APPARATUS. 
BRASS CIRCULAR “its 
HORIZONTAL 
SUN-DIAL, 
fe Complete on 
TERRA- COTTA 
PEDESTAL. 
12-in. diameter, £6 10s. 
| 
Sun-Dials of every Description 
Price Lists on Application. 
NEWTON & CO., 
Opticians to the Queen | 
and Government, | 
3 FLEET STREET, 
LONDON. | 
| - NEGRETTI & ZAMBRA’S 
SHORT BEAM BALANCES. 'BINOCULARS AND TELESCOPES. 
CHEAP, gate aA. 
KNIFE aie AND PLANES OF AGATE 
Compensating Stirrup 
Suspenders, 
To carry 200, 500 grammes. 
Price £7. £9 _ £9 9s. 
ASSAY BALANCES. 
ALUMINIUM BEAms. 
5 Grammes in each Pan. 
Indicate 75 m.g. 
£10 10s. + and £7. 
CHEMICAL BALANCE. 
ALUMINIUM Beam. 
ews design Sliding Rider. 
- Tocarry 100 250 grms. 
Indicates ts vis M.g. 
£815s. £10 10s 
WRITE for BALANCE CATALOGUE 
Special Balances to meet the Requirements of the Science and Art 
Department. 
CATALOGUES POST FREE ON APPLICATION. 
JAMES WOOLLEY, SONS & CO., Lro., 
CTORIA BRIDGE, MANCHESTER. 
Makers of the ‘“‘OFFICER OF THE WATCH” TELESCOPE, 
in use on all the vessels of H.M. Navy. 
Nickel-plated, covered with Brown 
eather. 
PRICE creas. 
Y Perrect Derinition & Hicu Power. 
As supplied by NEGRETTI & ZAMBRA to the War Office. 
Length, when closed, rx inches. Combining high power and px ortability. 
NEGRETTI & ZAMBRA, 
| SCIENTIFIC INSTRUMENT MAKERS to the QUEEN, 
JOHN J, GRIFFIN- en SONS, 1° 38 HOLBORN VIADUCT, E.C. 
20-26 SARDINIA STREET, LONDON, W.C. Branches: 45 CORNHILL; 122 REGENT STREET. 
