Observations of the Spots on the Sun; From November 9, 1853, to March 24, 1861, Made at Redhill (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1863 Excerpt: ...spot. at 162.5. 94 + I3'1 166.5 1'4 +12.8 Diurnal motions + 15' and--4'.... for lat. +130. 470. A neat circular spot. at 173.6.. 306.8..-25.3 176.6.. 308.2..--26.0 The last observation was taken very near the limb, and as the resulting motions are con-tradictory, I do not put them down. 471. A dot first without and then with penumbra. at 166.6.. 298.6.. +i6.o 173.6.. 299.8.. +15.6 476. Observed three times, but as one of two components disappears, no comparison of positions can be made. 488. I disregard the influence of the small spots north-following. at 190.6.. 2.2.. +134 197.6.. 2.2.. +13.7 Diurnal motions zero and + 3' 491. The dots north-following are disregarded. at 197.6.. 299.9 + 7'2 201.5.. 302.1.. +8.3 204.7 34'2 +94 495. This large group was preceded in the former rotation by a group 476, which has a remarkable similarity to group 513 which follows in the next rotation. 496, 516, and 535. The principal nucleus comes round a third time. The group at first is of enormous area, some 16 by 8 degrees. I compare the positions of the principal nucleus: 503. Afterwards the enormous group 520. Compare the whirl of penumbra in each. 508. One group disappears, and another breaks out. I compare two positions of a dot which follows: at 222.735.. 298.0.. +9.1 225.529.. 298.3.. +9.5 516. There is probably remaining divergence, and no means of ascertaining or avoiding its effect. 518. All these spots may be treated individually. A.. at 232.5.. 168.4..--19.3 236.5.. 167.6..-19.3 239.5 l66.7.-197 Diurnal motions--14'and +3'.... for lat.--19 .. at 232.5.. 16o.i..--24.9 236'5 I58.5-25.2 239'5 i5i.9 25'2 Diurnal motions--28' and +I'.... for lat.--25o. 619. A detached spot of simple form. at 232.5.. 144.9 + 22'6 (near the limb.) 236.5.. 143.4.. +22.9 239.5. W6....