Glass-covered slides are mounted B. 800 Foot Con+inuous

Projection nnent for Film.

Attach- 1 6 mm.

t .It

I i( II

1 w <,■

I / r 1 1 I <■ c tors . itli. I \<. i!h or witliiiut

With sound runs 22 niin.

without I cpt'.itin^; Sil>nt pKSMitat ii-'n l.')sts

J,i mjn.

Bell & Howrll, ChicaKO. Ill

with tape or metal bindings. Projectors similar to the Selectroslide in A above require a glass-covered slide or one with a metal frame.

The recognized value of moving pictures and lantern slides for the effective presentation of facts and ideas has recently produced several easily operated machines for projection by remote control or continuous automatic action. Some of these are illustrated -- the Selectroslide in A above, the Kodaslide in 405A, the Bell 8g Howell automatic machines in B and C, and the Contimovie in 407A. For advertising, exhibitions, and educational work some equipment of this type is almost a necessity.

Bell (k Howell. ChifttKo. Ill

C. 600 Foot Continuous Projection Attachment in Sound-Proof Case with Shadow Box and Screen in Place.

.1.

LANTERN SLIDES

Sources of Screens

Da- Lite Screen Company, Chicago, Illinois.

Motion Picture Screen &> Accessories, Inc., New York City. (See

C below) Raven Screen Corporation, New York City. Sasco Photo Products, Los Angeles, California. (See B below)

Eighteen Kodachrome films in Ready-Mounts 2" x 2" cost $2.2 5, about 14 cents each if there are no failures. Glass-covered black and white slides of the same size may be made for about the same price. Some other types and larger sizes are higher. It is as easy now to use color as black and white, but the slides are not so durable. Heat and concentrated light affect color, especially the yellows, though the dyes are improving in this respect.