Agricultural specialist walking beside a cow outside a barn at University of Maryland experimental dairy farm in College Park, Maryland. Calves eating from buckets with stems to simulate teats. Close-up view of body of cow standing in barn. A cow is injected with small dose of radioactive isotope to trace efficiency of feed conversion into milk. Cow is marked with a piece of tape identifying it as radioactive. A scientist takes milk sample from the cow. The milk is analyzed in a laboratory. Various laboratory instruments and scientists in white lab coats working with them. Sample is broken down into components to determine how much of the radioactive injection was converted into milk. Close up view of Geiger counter instrument in laboratory for measuring radioactivity of samples. Milk being poured into small sample vials for analysis. Narrator notes the research is providing "new clues to cattle nutrition which will mean more milk and better milk on our breakfast tables." Another closeup view of the Holstein cow in the barn.
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| Type | Size | Price (USD) Standard License |
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