WEEKLY 
ILLUSTRATED JOURNAL OF SCIENCE 
“To the solid ground 
Of Nature trusts the mind which builds for aye.’—WoRDSWORTH 
No. 818, VOL. 32] THURSDAY, 
Oo 
t 
JULY 2, 1885 [PRICE SIXPENCE 
Registered as a Newspaper at the General Post Office] 
{All Rights are Reserved 
AMATEUR PHOTOGRAPHY. 
MARION’S Britannia Dry Plates are the Best and 
Cheapest. 
MARION’S Photographic Outfits. The Largestand Best 
Selection for the Tourist, Artist, Bicylist, Military Man, and others. 
Special Outfits for Beginners. Price for Complete Set, 
from 45s. and upwards. 
MARION’S Academy Camera. 
MARION’S Miniature Camera. 
MARION’S Registered Washing Apparatus. 
MARION’S Rectilinear and Portrait Lenses, 
IWARION’S Ready Sensitised Paper. 
WLARION’S Instantaneous Shutters, 
MARION’S Enlarging Apparatus and Magic Lantern. 
MARION’S Best French Mounts. 
MARION’S Self-Adjusting Rolling Press and Burnisher. 
MARION’S Practical Guide to Photography. Second Edi- 
tion, Revised and Enlarged, giving clear and precise Instructions for 
Learning and Practising Photography. Price 2s. 6d. post free. 
Free Lessons in Photography to Purchasers.—_Marion and 
Co. have erected a Gallery in Soho Square, specially for giving Lessons. 
Printing from Amateurs’ Negatives, Enlarging. 
MARION’S Alpha Paper Prints by Gaslight in One 
Minute. The printing process of the future. Sample packet 5s. 
Photographs Mounted, Arranged, & BoundintoVolumes. 
Chemicals, Mounts, Albums, Scrap Books. 
PRICED LIST FREE ON APPLICATION. 
MARION &Co., 22 & 23, Soho Square, London. 
SHOW ROOM—GROUND FLOOR. 
RIBBON SECTION CUTTING. 
The Cambridge Scientific Instrument Company have designed a new and 
simple Microtome for cutting continuous Ribbons of Sections of Microscopic 
Preparations on the plan first adopted by Mr. Caldwell. The new instru- 
ment has the advantage over the original pattern of dispensing with the 
endless band altogether, and consequently not only avoiding the trouble 
of lifting the series of Sections from the razor, but also of allowing them to 
fall on to the glass slide in their proper position for mounting. Price of the 
Microtome, 45 5s. 
The Company are appointed Agents or the Microscopes of Zeiss, a supply 
of which is kept in stock. 
THE CAMBRIDGE SCIENTIFIC INSTRUMENT CO., 
Cambridge. 
VICTORIA UNIVERSITY. 
UNIVERSITY COLLEGE, LIVERPOOL. 
PROFESSORSHIP OF ENGINEERING. 
Applications are invited for a new Chair of Engineering, Salary £375 
a Year, together with two-thirds of the Fees derived from Students. The 
Professor will be required tocommence work at the beginning of OCTOBER 
next, : 2 
Applications with Copies of Testimonials to be sent not later than JULY 5 
to the College Registrar, who will supply full particulars on inquiry. 
BOOKS (Secondhand), Miscellaneous, Re- 
mainders, &e.—C. HERBERT, English and Foreign Bookseller, 319 
Goswell Road, London, E.C. Catalogue free on receipt of two stamps 
Libraries, Old Books, and Parchment purchased. 
BROWNING’S AMATEUR’S SET 
OF PHOTOGRAPHIC APPARATUS 
ry 
For Dry-Plate Photography, comprising every Article 
shown in the Engraving, Complete in Case, price £2 5s. 
Fut ILLUSTRATED CATALOGUE OF PHOTOGRAPHIC APPARATUS SENT FREE® 
JOHN BROWNING, 63, STRAND, LONDON, W.-C. 
NEGRETTI AND ZAMBRA, 
SOLE MAKERS OF 
JORDAN’S (PATENT) SUNSHINE RECORDER. 
PRICE £3 3s. 
N E.G@R.E-F-T-1 
ZAMSBRA, 
ScrentiFic INSTRUMENT MAKERS 
TO THE QUEEN, 
HOLBORN VIADUCT. 
Branches :—45, Cornhill ; 
122, Regent Street, London. 
Lliustrated Description Post Free. 
NEGRETTI & ZAMBRA’S 
Large Illustrated Catalogue, 
600 Pages, 
1200 Engravines. 
Price 5s. 62. 
