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Bausch & Lomb Optical Company Optical Projection Although unappreciated and undeveloped for generations, optical projection has come into its own at last. It is to-day an agency of widely recognized value in the scientific and educational world and in many other fields of usefulness. Starting in the institutions of higher learning the projection In Education ^ ^ bto very general use in high schools and grammar schools in many branches of instruction. Its serious recognition by educators is apfaren. in the fact .ha, the New Yotk State Education, Depart- ment has organized a Department oi Visual Instruction, possessing a collection » more than 300,000 slides which may be obtained free of cost by schools under e Department. Movements are on foot in other states looking to similar ends. A large number of churches and Sunday schools now possess projection outfits for the double purpose of instruction and enter- tainment. The interest and value of Sunday evening addresses and Bible lessons are greatly enhanced by projected views. Lodges and fraternal organizations, too, are coming to use the lantern extensively in their ritualistic work. Always popular in the home as an entertainer .t now has a stronger hold there than ever before by virtue of the really high grade apparatus which can be produced at a moderate cost. Many camera clubs and individual enthusiasts are numbered Supplement amQng Qur patrons . The projection lantern renders a two-fold to Camera ^ enables the individual to reproduce specimens of his art most effectively, while clubs find it an invaluable aid in the study and discussion of photographic processes. In Church, Lodge and Home Historical Resume While optical projection in this scientific and universal application is of comparatively recent development, the basic principles have been known and exemplified in various primitive forms of apparatus for several centuries. In many Latin writings between the years 1500 and 1700 we find the projection lantern described as the camera obsc or “laterna magica”. Who the inventor was seems to be unknown. The achiev - men^has been^variously aactibed to Bacon, Potta, Dacha,*, Kitche, and o.he, authors who have handed it down in literature to succeeding generations. This impression is erroneous, however. None of these writers has claimed the distinction, and all have written as though treating facts and principles which even at that early period, had been established for some time. It is quite probable that several different experimenters in light and optics devised crude lanterns independently of each other. Those pioneers in the field were regarded for the most part Work ° f as wizards, and the primitive outfits which they fathered excited “ WUardS ” curiosity, mingled with awe, and little more. Optical projection occupied scarcely any stronger position during the intervening centuries down to comparatively modern times. 6