October Third Success Secret – Dr. Donald Laird

October 3, 2019 — Leave a comment

Efficiency falls when the temperature goes much above 68 degrees Fahrenheit. Both mental and muscular work is lessened either in quality, or quantity, or both, at temperatures even slightly above this point. When it is below 48 degrees human efficiency also begins to fall. The temperature of 68 degrees is generally considered the best for health as well as for efficiency.

~ Dr. Donald Laird, Increasing Personal Efficiency (1936)

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