Projection Apparatus (1917)

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Bausch & Lomb Optical Company With dissolving views. Outfit No. 7 1 Double CML15 Model C Balopticon ..... $130.00 1 No. 4425 Screen, 10 x 10 feet ------- net 15.00 1 No. 4252 Stand --------- 16.00 Outfit No. 8 1 Double DAL15 Model D Balopticon - - - - - $170.00 2 No. 4450 Rheostats _ _______ 14.00 1 No. 4425 Screen, 10 x 10 feet ------- net 15.00 1 No. 4252 Stand --------- 16.00 With dissolving lantern slide views and moving picture projection, interchangeably. Outfit No. 9 1 No. 5212, 5214 or 5216, depending on mechanism desired (see p. 37 for price) 1 No. 4454 Rheostat --------- $18.00 1 No. 4456 Rheostat --------- 27.00 1 No. 4425 Screen, 10 x 10 feet ------- net 15.00 For use in Physical Science Departments where an apparatus with optical bed, to which various attachments may be added, is desired. Outfit No. 10 1 No. DAlOq Model D Balopticon ------ $65.00 1 No. 4450 Rheostat --------- 7.00 1 No. 4423 Screen, 9x9 feet net 12.00 1 No. 4252 Stand --------- 16.00 For Microscopical Projection Only Particularly recommended where only alternating current is available. Outfit No. 11 1 No. 4300 Simplified Micro-Projection Outfit - - - - $43.00 1 No. 4304 Microscope Plate ------- 3.50 With this equipment either the regular table microscopes or the special projection microscopes (see pp. 109-112) may be used. 97