be fifty- three degrees. these fifty-three degrees being subtracted from ninety degrees--the distance from the pole to the equator--there remained thirty- seven degrees. cyrus harding concluded， therefore， that lincoln island was situated on the thirty-seventh degree of the southern latitude， or taking into consideration through the imperfection of the performance， an error of five degrees， that it must be situated between the thirty-fifth and the fortieth parallel.
按道理，当影子的长度缩到最短的时候，应该正