Q: I want to take advantage of the cooler weather and upgrade our older air conditioner with a more efficient model. The salesman recommended we upgrade to a 4-ton unit because we have added a bedroom ...
I AGREE with your correspondent, Mr. R. B. Hayward (NATURE, vol. xxxv. p. 604), in holding that names for the dynamical units are of less importance than a convenient notation for them. To invent ...
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