ssary 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. on his first position only a very small fraction of a is over nineteen times the distance from the sun to The critical… … MORNING AND EVENING STARS FOR 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 1-38 deg. (= 22 sun, and his period of revolution is nearly 165…
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