We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
ATOMS FOR SPACE AND SNAP RADIOISOTOPES IN BIOLOGY AND AGRICULTURE (Understanding the Atom Series) See page 62 RIDDLE OF PHOTOSYNTHESIS (Magic of the Atom Series). . . . See page 57 ROUNDUP (1960). 18!/ 4 minutes, color. Produced by, and for sale by, the U. S. Department of Agricul- ture, Motion Picture Service, at $80.00 per print, including ship- ping case, F.O.B. Washington, D. C. This film describes the use of radiation to eradicate the screwworm fly in the southeastern United States, an insect pest that had caused large losses to livestock owners. The film describes how the screw- worm fly deposits its eggs in a cut or insect bite on the skin of a warm- blooded animal. The eggs hatch to worms that feed on live flesh and then fall to the ground, where they burrow into the soil and change to pupae. Ten days later the fly emerges and mates, and the cycle con- tinues. The film shows typical cases of screwworm infestation. Ento- mologists of the Agricultural Research Service suggested that since screwworm flies mate only once, if a method of sexually sterilizing flies could be found, eradication was possible. Since X ray was too ex- pensive, radioactive cobalt ( 60 Co) was selected to do the sterilization job. The plan was tested on the tiny island of Curasao off the coast of Venezuela, where sterilized male flies were released from aircraft in patterns over the island. In six months the pest was eliminated. Similar operations were followed in Florida and other southeastern states. A huge screwworm factory was built in Florida, where 50 mil- lion flies were reared and sterilized in a week, with pupae subjected to 8000 roentgens of gamma rays. Ten million sterilized male flies were airdropped on infested areas. Eventually the screwworm fly was brought under full control and largely eradicated. (Nontechnical: suit- able for all audience levels.) TRACING AIRBORNE RADIOACTIVITY (Challenge Series) .... See page 52 ATOMS FOR SPACE AND SNAP ATOMIC WEATHERMAN: STRONTIUM-90 ISOTOPIC APPLICATIONS See page 13 ATOMS FOR SPACE (1962). 28% minutes, color. Produced by Atomics International and the Martin Company for USAEC. For sale by General Film Laboratories, at $125.00 for one print, including shipping case, prepaid parcel post book rate.