ecessary to indicate the dates at the beginning and at the end of the year. The former After an interval of exactly 88 days, Mercury gains is a simple matter to identify that'blade. The critical number of revolutions of the engine can on his first position only a very small fraction of a is over… … / '«■■ *' <^ -if :'£ i MORNING AND EVENING STABS FOB 1907. thirty times the distance between the earth and the days, during which Mercury makes four revolutions, quick-running engines, such as torpedo boats, experi- he advances on his first position about 1-3 deg. (= 22 sun, and his period of…
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