Bausch & Lomb Optical Company / / … Figure 2—Diagram Showing Path of Light for Lantern Slide Projection: A = Arc; B - - Rear Lenses of Condensing System; C = Front Lens of Condensing System; H = Projection Lens for Lantern Slides; M = Optical Bed; N = Slide Carrier Holder; 0 = Bellows. in 4x5 or 5 x 7-inch sizes. For these we have…
