The educational screen (c1922-c1956])

128 School Department The Educational Screen Bausch & Lomb Portable Balopticon Traveling lecturers and special instructors find the Model A Portable Balopticon to be absolute insurance against projection failure. In addition to reliability, its convenience will also be appreciated. The carrying case, measuring only \3}/^ x 11 x 63^, is sturdily made and so easily balanced that it is extremely easy to carry. Its 400Watt gas-filled Mazda lamp operates on any 1 1 0-volt light circuit. This Balopticon can be fitted with an acetylene burner, a 6-volt Mazda lamp, for use with storage battery, or a 30-volt, 14-ampere Mazda for private lighting plants. Prices range from $57 to $70 according to equipment. ASK YOUR DEALER FOR BOOKLET. OR WRITE TO US Bausch ^ Jpmb Optical (6. NEW YORK WASHINGTON SAN FRANCISCO CHICAGO ROCHESTER, N. Y. London The Cruise of the Princess MacQuinn. (Producer, Lee Bradford Corporation.) Another of the Canadian Series — this a "pictorial log of a journey up the west coast of Vancouver." Here is material to stimulate any producer to turn out a valuable educational subject; excellent views of the Northwest coast country, fishing boats, typical coast villages, copper mines, basket weaving^ being done by Indian women, an Indian cemetery, a ghmpse of the whaling industry, and at Point Alice, a cargo of wood pulp being loaded onto a ship bound for a paper mill. In spite of the possibilities, the reel is chiefly interesting as an illustration of the pernicious results which can be achieved with good material by the misguided efforts of the ever-present title writer. The one who has been entrusted with the Bradford productions is resolved to be witty, at whatever cost to the serious use of his film. For example, after a particularly good close view of a whale being pulled up onto a wharf, its huge hulk shiny and dripping, the title artist exclaims with masterful effect, "That ought to be a lesson to any whale." A Mack Sennett among the educationalists. The Crayfish and the Stickleback. (Pathe.) A spHt reel, the footage divided between the two subjects. The crayfish is introduced as an arthropod belonging to the class of Crustaceans. Views of his habitat are shown — the stony bottoms of rivers and ponds. He is a nightfeeder, fond of worms, small fish and vegetable food. A series of closeups show his strong, powerful jaws; two long, flexible antennae, and his head and thorax closely attached. Eggs are carried attached to the abdomen of the female, where they remain until hatched. The crayfish can reproduce lost parts and can live for a time out of water. Another closeup shows the swimmerets which help him to move with great rapidity. The second half of the reel shows "the fish that builds a nest." He is found in streams and ponds, although certain species also live in the ocean. He gets his name from the spines projecting from his back— which he no doubt uses to good effect when he gets into disputes about food — a thing which often happens. The nest of the fish is made by the male, who . guards it faithfully after the eggs are deposited. \ A most interesting reel, as well for a general program as for classes in Zoology or Natural Science.