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11 résultats pour : 1930s research laboratory

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Female Researcher working in a medical research laboratory in 1937.
UMG22A03_361

Female Researcher working in a medical research la...

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

1939 - government experiments test the ability to ...

Research Chimp At Yale Labs
UMG20A23_310

Research Chimp At Yale Labs

Scientists Test Auto Ignition
UMG20A12_406

Scientists Test Auto Ignition

Cultivating Germs
UMG20A12_398

Cultivating Germs

Scientist With Microscope
UMG20A12_400

Scientist With Microscope

Scientist With Microscope
UMG20A12_401

Scientist With Microscope

Billions of Germs In A Closet
UMG20A19_305

Billions of Germs In A Closet

Searching For Germs
UMG20A12_394

Searching For Germs

TV Demonstration At Bell Labs
UMG20A13_212

TV Demonstration At Bell Labs

Early Fax Machine
UMG20A12_247

Early Fax Machine