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i. The Optical Magic Lantern Journal and Photographic Enlarger.
IF YOU WISH TO KNOW
1.—What focus of lens is required to produce a certain size of disc, at a given distance ; 9.— What size of disc can be produced by a lens of given focus at a stated distance ;
3,—What distance a lantern must be from the screen to produce a certain sized disc with a lens of given focus ;
SEND 2id. FOR A
Ready Reference Table
(On Cardboard) By J. HAY TAYLOR. FASTEN IT ON THE LID OF LANTERN BOX.
:3§
WAGIC LANTERN JOURNAL COMPANY, Lid, 9, Carts Set, Landon, BC, OPTICAL LANTERNS & SLIDES
OF THE HIGHEST QUALITY ONLY.
NEWTON & CO.’S patent STEREOSCOPIC PICTURES rz; DEMONSTRATOR’S ” LANTERN. Shown with the Lantern by the
FOR OIL OR LIMELIGHT. CONEWTONIAN” SYSTEM,
With Prisms for Erecting, and (Patent applied for). for Vertical Projection.
The most simple and effic’ent Single Lantern
a y et construct:d THE NEW PH OTOGRAPHY. 3, FLEET STREET, fcr general RAY “FOCUS” TUBE, 35s. LONDON. scientific work. There has been great difficulty in obtaining suitable Vacuum Tubes
for producing the Réntgen X Rays for photographic purposes, chiefly because the best conditions were not known. A long Series of careful experiments has been made, to ascertain the conditions of success, at King's College, London, which has resulted ina tube of different shape, size,and degree of vacuum to those previously employed.
One important result of this is that far less current can be employed, and that a simp‘e battery and coil may be used without Tesla apparatus.
Complete Set of Apparatus for Photographing with the X Rays. comprising Battery, Coil, Tube, &c., £18 18s.
Complete Set, aS above, but with larger Coil and more Battery Power,
NEW CATALOCUE of Lanterrs, Projection Apparatus
ani Blides. Post Free,
6 Stamps.
33. The following Slides have now been added to those already published : (7) Foot, naked, showing bones spread as in walking. (8) Foot, in sock, showing bones cramped together by the sock. (9) Hand of a Lady, by Mr. S. Rowland. (10) Hand of a Lady, showing all the bones, including the thumb and wrist. This is the finest Hand yet produced. (11) Fish, Sole, showing bones, &c. (12) Fish, Plaice, showing bones &c. (13) Cigars in Aluminium Case, and various subjects showing different . degrees of transparency. (t4) Husnan Wrist and Arm Bones. (15) Human Hand, showing deformity of finger. (16) Human Hand, showing damaged finger. &c., &c., &c.
New Detailed Illustrated Catalogue of Lanterns and Slides, 6 stampa. NEWTON & Co. manviacture Patent Newtonian 4-wick Oil Lampe. Major Holden’se Arc Lamp. Newton's Patent Hand Feed Lamr. Newton’s Patent ‘‘ Demonstrator’s" /Lantern. Patent Adjusting Trey for Jets. Askew’s Patent Combination Lantern Bor and Stand. Wright's Lantern Microscope. Wright's Oxy-Hydrogen Jets with ‘ Pringle-Oot off." The “ Miniature’ Lantern. The Scientist’s Bi-Unial. Traill Taylor's Triple Condenser.
Price is. 6d. each. List on Application.
NEWTON & CO.,
8, FLEET STREET, LONDON, E.O.
Printed and Published by the Proprietors, THs Magic LANTERN JOUANAL COMPANY, Ltp., 9, Oarthusian Street, London, E.O.