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The Optical Magic Lantern Journal and Photographic Enlarger. v.
PLEX OTHER SPECIALITIES. Par ond OXYGEN AND HYDROGEN GAS. = CYLINDERS OF ALL SIZES.
Cinematograph Exhibitions.
Secondhand Lanterns Bought, Sold, Exchanged or Lent. GAUGES.
REGULATOR 2 sats soins Hoon cis lontn,
Dissolving View Magic Lanterns and Slides SANDS, HUNTER & Co., SeeeeN gesorotion of misalazeaus wepery. "| Photographic Apparatus and Lanterns,
R. J. OC, STEVENS begs to announce that be holds Sales of the M above, every Friday, at half-past twelve precisely, at his great NEW AND SECOND HAND, BY ALL THE BEST MAKERS.
Rooms, 88, King Street, Covent Garden, London. Lanterns and Operator let out for evening enterGentlemen wishing to include property in these Sales are requested to tainments for children, &c. Terms Moderate. send particulars one week prior to sale. 20, Oranbourne St., Leicester Square, London, W.O.
SP You Wish to Know...
1.—What focus of lens is required to produce a certain size of disc, at a given distance ;
2.—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 23d. FOR A
READY REFERENCE TABLE
(ON CARDBOARD.)
By J. HAY TAYLOR.
~=' FASTEN IT ON THE LID OF LANTERN BOX. =
Ragic Lantern Journal Co., Limited,
9a, CARTHUSIAN STREET, LONDON, E.C.
ALFRED H. SAUNDERS —. e Limelight Expert. MAKER OF LANTERN SLIDES (Wet Collodion), SLIDE ARTIST. Colouring—Realistic, Natural, Effective.
109, CITY ROAD, BIRMINGHAM. Office of the BIRMINGHAM AND MIDLAND LECTURE BUREAU. N.B.—Vacancies for Pupils.
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