Queensland State Archives posted a photo:
Office Workers Should Not Be Tired
Mental work uses up so little of the body’s energy that a piece of banana no longer than the end of your little finger will support steady concentration for nearly half an hour.
This is the scientists’ latest discovery, and now they are trying to discover what it is that makes office workers bodily tired. Their only explanation is that the strain of the eye muscles in reading, the ear muscles in hearing, and the body muscles in maintaining the same position produce the fatigue.
A number of people have been helping these scientists with their discoveries. In order to do this they have worked at various tasks with their heads enclosed in helmets that would gauge the amount of oxygen they used. Some even lived for days in glass houses.
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Sunshine Advocate, 29 June 1934
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