RT Journal Article SR Electronic T1 On the period of the rotation of the Sun as determined by the spectroscope JF American Journal of Science JO Am J Sci FD American Journal of Science SP 151 OP 159 DO 10.2475/ajs.s3-35.206.151 VO s3-35 IS 206 A1 Henry Crew YR 1888 UL http://www.ajsonline.org/content/s3-35/206/151.abstract AB