‘Atomics is a very intricate theorem and can be worked out with algebra but you would want to take it by degrees because you might spend the whole night proving a bit of it with rulers and cosines and similar other instruments and then at the wind-up not believe what you had proved at all. If that happened you would have to go back over it till you got a place where you could believe your own facts and figures as delineated from Hall and Knight’s Algebra and then go on again from that particular place till you had the whole thing properly believed and not have bits of it half-believed or a
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