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Undated (4)
1950-05 (1)

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Agricultural Equ... (2)
Animal Feeding (1)
Ballestas Island... (1)
Chickens (1)
Croplands (1)
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Agronomy (1)
Physics (1)
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1. Personnel with automatic fraction collector Personnel with automatic fraction collector Physics; Purdue University;Scientific equipment; Photograph of School of Science - Biological Sciences; Automatic fraction collector; May 1950;
2. Experimental automatic silo unloader Experimental automatic silo unloader Agricultural extension work; Agricultural equipment College of Agricultural. Electric farm - Experimental automatic silo unloader
3. Sacking guano to be shipped Sacking guano to be shipped Ballestas Islands (Peru);Peru Fig. 8 - Sacking guano to be shipped by anda-rivel (automatic trolley), Ballestas Islands. [from textbook?] Lantern Slide. (no date)
4. Central egg collecting unit Central egg collecting unit Chickens; Eggs;Animal feeding; Agricultural equipment;Richland (Mich.);Michigan Agriculture, School of--Animal Sciences (Poultry). Central Egg Collecting Unit with transveyor plus Automatic Feeding and Econo (cable) - Pit Cleaner at Mr. Ehriman's 10,000 bird layer house, Richland....
5. Tractor plowing field Tractor plowing field Farms; Croplands; Tractors; Agriculture - Farms. The new Case 4-wheel drive 2870 Traction King has a manufacturer's rating of 300 engine horsepower. Powered by a turbocharged, 64 cubic inch diesel engine, the new tractor delivers...
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