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12 résultats pour : 1930s experiments

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Men in laboratory
UMG22A04_061

Men in laboratory

1939 - government experiments test the ability to make egg whites different colors.
UMG21A21_457

1939 - government experiments test the ability to ...

1939 - government experiments test the ability to make egg whites different colors.
UMG21A21_458

1939 - government experiments test the ability to ...

1939 - government experiments test the ability to make egg whites different colors.
UMG21A21_459

1939 - government experiments test the ability to ...

Dr. L.F. Curtiss, of the U.S. Bureau of Standards, is shown here with part of the equipment he uses in experiments using radio to gather meteorological data at great altitudes circa 10/17/1935.
UMG21A22_276

Dr. L.F. Curtiss, of the U.S. Bureau of Standards,...

Government scientists conducting tests on electrical current circa 1938.
UMG21A21_353

Government scientists conducting tests on electric...

Blindfolded man and woman are part of a Meat testing experiment at the U.S. Department of Agriculture circa 1936.
UMG21A22_427

Blindfolded man and woman are part of a Meat testi...

A rural laboratory on a collective farm in the orsha district of the mari autonomous republic, soviet farmers conducted experiments in the field, and corresponded with experimental agricultural statio...
UMG20B00_164

A rural laboratory on a collective farm in the ors...

Scientists Test Auto Ignition
UMG20A12_406

Scientists Test Auto Ignition

Spotted Fever Mouse Research
UMG20A12_405

Spotted Fever Mouse Research

Searching For Germs
UMG20A12_394

Searching For Germs

Testing A Bullet Proof Vest
UMG20A12_105

Testing A Bullet Proof Vest