ly one- motion of the earth in its orbit, each segment of the On January 28, 11 A. M., a screen image of the sun fourth of the disk apart, both were discernible without spot-zones is in view of the earth thirteen and a half was arranged to measure one foot in diameter and magnifying power. days,… … the stupendous eruption vis- May; and on the 23d and ible from January 28 to Febru- 24th of that month the visi- ary 10. At the same time, ble photosphere as seen in a the northeastern zones were 4-inch telescope was entirely east limb. If centrally situated, this photospheric also tracts of latent…
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![An illustration from Le triomphe de la langue françoise, dans lequel les principales difficultés qui s'y rencontrent sont revnersées [microform] (1664)](https://img.insideoutlibrary.com/img/200/ia-fre_b1888570-64-0.webp)
