Motion pictures for instruction (1926)

302 MOTION PICTURES FOR INSTRUCTION ing the formation of the clay beds prior to and during the glacial age, modern methods of mining, manufacturing, burning and glazing. See Saw — Manufacture of Saws — N. C. B. An exposition of the interesting processes through which a saw passes in its manufacture. Story of Steel Alloy — 4 reels — Bu. Mines. The ferro-alloy storage bins — the great cast-iron scrap piles — the charging of scrap iron into open-hearth furnaces — the pouring of the white-hot molten metal and the rolling of the ingots into merchant bar. What About Macadam ! — V. S. Ag. An explanation of the means whereby macadam roads may be made satisfactory for automobile traffic — approved methods of building macadam roads on Federal aid projects under the Bureau of Public Roads. Winter Logging — Caterpillar Tractor Co.. Peoria, III. This film shows the use of the "caterpillar" tractor in the removal of logs in the northern woods — pulling train formations of heavily loaded log sleds from forest to mill — exceptionally good winter scenics throughout. Cloth and Coverings Carpeting a Century — Bigelaw Hartford Co., 385 Madi-san Ave., New York City. Detailed scenes of the operations in the manufacture of rugs and carpets from the preparation of the woolen yarn to the finished article, including setting the design, weaving, shearing, etc. Civilization's Fabric-Cotton — Converse & Co., 88 Worth St., New York City. Complete story of cotton, the great fabric of modern life. Cotton Manufacture — 4 reels — U. S. Ag. The story of cotton from the time it arrives at the mill, including the steps of spinning, weaving, etc., until the cotton cloth is finished.