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Bausch & Lomb Optic al Company Slide Carriers Figure 1—Rapid-Changing Slide Carrier, No. 4449. A satisfactory slide carrier, both con- venient and durable, is essential to a high grade projection apparatus. We supply several which have given such satisfaction. Particular attention is called to No. 4449, our new rapid-changing slide carrier, which is a double carrier operated entirely from one side. As a new slide is fed for- ward, the preceding slide is automatically returned, and a metal shield, which travels with the slide, obliterates all movement of the slide on the screen, so notice- able m ordinary double carriers and other types of slide changers. This approxi- mates a dissolving effect, thereby relieving all eyestrain. Two carriers, Nos. 4430 and 4432, are neatly finished wooden frames, provided with an automatic elevating device. This consists of loosely fitted metal pins beneath the center of the slides, which engage with an inclined plane at the end of the sliding Figure 2—Slide Carrier, No. 4430. movement, raising the slide so that it may be easily lifted out by its margin. No. 4430 is regularly supplied with our lantern slide equipments. An all-metal slide, No. 4435, is provided with an automatic centering device, which enables one to use slides of the English dimensions and the Standard American size in the same carrier. The measure- ments, which are given below, are outside dimensions and should not be confused with the size of the mats. We also make a convenient post card carrier for Figure 3—Slide Carrier, No. 4435. our apparatus projecting opaque objects. Code Word Cat. No. Specifications Slide Carrier, for two 3X x 4-inch slides with auto- matic elevating device Double Slide Carrier, for either 3X x 3 '/ or 3 V x 4-inch slides with automatic elevating device Slide. Carrier, all metal, with automatic centering device for slides x 3#, 3j( x4 and 3X x 4-/ inches . Rapid-Changing Slide Carrier , Post Card Carrier, holds cards and prints up to 5X inches square . Extra Holders for above, each Price $1.25 1.75 3.50 2.75 2.00 .75 Note—The semi-dissolving slide carrier, No. 4449, may be substituted on any equip ment regularly supplied with No. 4430 for $ 1.50 additional. 123