Motography (Apr-Dec 1911)

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October, 1911. MOTOGRAPHY 185 thereon are rotated intermittently by means of the spring in unison with the continuous rotation of the drum. The action of the spiral spring prevents any rotative oscillation of the stop and maintains it, in constant contact alternately with the stud and the guard rim regardless of any wear or imperfect adjustment of the co-acting members. The accuracy of the intermittent movement of the film by the sprocket wheels for projecting pictures on the canvas with i*{\ 993,551. steadiness is very materially increased by the use of the spiral spring. Claim 1. A kinetoscope comprising a driving and driven shaft, a multiple stop carried by the driven shaft, means carried by the driving shaft for releasing and engaging with different portions of the stop alternately in synchronism with the driving shaft and yielding connection for rotating the stop. 996,991. Method of Making Celluloid. Lorenz Ach, Mannheim, Germany, assignor to C. F. Boehringer & Soehne, MannheimWaldorf, Germany. Waiving the highly technical language of the description of the process and product, the claims are quoted as complete and brief descriptions : 1. The process of forming plastic materials, which consists in adding to pyroxylin an organic compound containing oxygen linked in a closed chain between carbon atoms, to which carbon atoms no further oxygen is directly attached, and mixing the pyroxylin with such compound. 3. The process of forming plastic materials, which consists in adding to pyroxylin an organic compound containing a plurality of oxygen atoms linked in a closed chain between carbon atoms, to which carbon atoms no further oxygen is directly attached, and mixing the pyroxylin with such compound. 3. The process of forming plastic materials, which consists ini adding to pyroxylin the condensation product of an aldehyde or ketone with a polyhydric alcohol and mixing the pyroxylin with such product. 4. The process of forming plastic materials, which consists in adding to pyroxylin a glycerin ether and mixing the pyroxylin with the same. 5. The process of forming plastic materials which consists in adding to pyroxylin a cyclic ether of glycerin and mixing the pyroxylin with the same. 6. As a new composition of matter, a 'plastic pyroxylin composition comprising pyroxylin in combination with an organic compound containing oxygen linked in a closed chain between carbon atoms, to which carbon atoms no further oxygen is directly attached. 7. As a new composition of matter, a plastic pyroxylin composition comprising pyroxylin in combination with an organic compound containing a plurality of oxygen atoms linked in a closed chain between carbon atoms, to which carbon atoms no further oxygen is directly attached. 8. As a new composition of matter, a pyroxylin composition comprising pyroxylin combined with the condensation product of an aldehyde or a ketone with a polyhydric alcohol. 9. As a new composition of matter, a plastic pyroxylin composition comprising pyroxylin together with a glycerin ether. 10. As a new composition of matter, a plastic pyroxylin composition comprising pyroxylin combined with a cyclic glycerin ether. Educational Films in Germany To help the spread of higher education among the masses, some of the most eminent men of learning and practical achievement in Germany have volunteered to take part in getting up a great series of moving picture shows to be given in various cities of the empire. They will not only help to arrange the shows, but will also appear on the platform as lecturers. The scheme is part of a plan of university extension devised by the Society for the Promotion of Popular Science, of which Theodore Holleben, former ambassador to the United States, and Prof. Hugo Muensterberg of Harvard University are prominent members. The pictures to be displayed will relate to science, art and manufactures, and in each case the subject will be explained by a lecturer who is recognized as an expert. "The society has succeeded," the managing committee announces, "in securing Count Zeppelin to open the series with an address on aeronautics. He will be followed by a noted bacteriologist. Every performance will be attended by a specialist of recognized standing. The committee has assured itself of the co-operation of the best men in all the faculties. Lectures will be given three times a week, and the public will be admitted at the cost of 50 pfennigs (12 cents)." The first moving picture lectures will be given in Berlin next month. Other cities included in the circuit are Leipzig, Halle, Essen, Stuttgart and Munich. Detroit to Use Picture Advertising The Board of Commerce of Detroit has made arrangements to use moving pictures for advertising their city. An agreement was reached whereby a film company will photograph all points of interest, including public buildings, historical' places, samples of large manufacturing institutions, some action pictures — such as at dry docks, some of the prominent citizens and their homes, a new panorama, a 4,000-foot film of the city front from the river, complete views of the parks and boulevards,"and lakeshore drive, all the city officials, some of the finest' bath houses at Mt. Clemens, which in this set of pictures will be classed as a suburb, the police and fire, departments ; and, in fact, everything which would go to make up a complete picture story of the city of Detroit. These pictures, when completed, will be shown throughout this country to an average of 11,000,000 people a day, and should do much to aid in advertising Detroit as it should be. A representative of the Board of Commerce will make the arrangements for the pictures of all places desired for the list, and in about two weeks' time the company will send a representative to Detroit for the work as outlined by the Board of Commerce representative. No limit is placed on the number of pictures to be taken. It is merely up to the Board of Commerce to outline a series of pictures that will show Detroit to the best advantage.