Fly Density Survey by the Grill

Nature, conoolstruction and use of the fly grill for measuring fly density. (CDC^-086; 6 minutes, color) 27, 41 Fly High and Live: Oxygen Equipment U.S. Department of the Navy, 1944. How and when to use new diluter demand oxygen equipment; operation of system; safety features. To instruct pilots, aircrewmen, and all flying personnel. (MN 1 2860; 28 minutes) 7, 41 to Flying Sense U.S. Department of the Navy, 1945