SMYTH. SMYTH. Stars. Cycle No. Epoch. Colours. Epoch. Epoch. Colours. λ Arietis LXXVI 1830.9 1844.9 A. Yellowish white B. Blue a Piscium LXXXI 1838.9 A. Pale green 1844.8 1850.8 A. Greenish B. Blue SESTINI. Colours. A. White White A. Red orange B. Lighter red A. Yellowish A. White A. Yellow white A. Golden orange 4. Yelloro A. Golden orange A. White A. White A. White A. Very white w Auriga 1833.8 1845.7 1850.7 A. White 62 Eridani 1831.9 1845.9 A. Light yellow 14 Auriga 1832.8 1845.7 A. White 1850-7 23 Orionis. 1835.2 1845.9 1850-2 A. Yellowish 111 Tauri 1832 9 1845.9 A. Yellowish 118 Tauri 1838.9 1845.9 1850.2 A. White 8 Orionis , 1835:1 1845.9 1850-2 A. Yellowish À Orionis 1843:1 1845.9 1850.2 A. Yellowish i Orionis 1832-1 1845.9 A. Slightly yellor CCCLXIII. A Pale rose tint B. Purple A Flushed yellow B. Pale purple B. White CCCLXIV. 1851.3 A. Flushed white B. Violet tint A. Rather yellow B. White A. Bluish white B. Pale violet CCCLXXI. 1851.3 A. Blue B. Blue A. Flushed blue B. Pale blue A. Dingy orange B. Dingy orange A. Pale yellor B. Pale yellow CCCLXXXIV. 1849.2 A. Topaz yellow B. Smalt blue A. Rich yellow 6 Leonis 1832 2 1846.0 7 Leonis 1832 2 1846-0 9 Sextantis 18322 1846.0 35 Sextantis 1839.1 1846.1 54 Leonis 1839.3 1846.0 Leonis 1831.2 1846.2 1851.3 A. Pale yellow B. Violet A. Pale yellow B. White A. Pale yellow B Dusky red SMYTH. SMYTH. B. Lilac B. Native copper 1850.5 A. Bluish white B. Pale emerald A. Greyish B. Greenish 1850-5 A. Bluish B. Bluish A. Greyish B. Pale blue A. Greenish B. Redilish SESTINI. Colours. A. Orange A. Yellow d. Yelloon A. White A. Gold yellow A. Gold yellow A. Fine orange B. Copper colour A Riddish B. Rui orange A. White A. Orange gold A. Yellow A. Orange A. Yellowish white A. Yellow A. Yellowish A. Orange A. Gold orange A. Orange A. White A. White A. Gold yellor A. Yellow A. White All the differences in the above list are subject to several doubts, and many of the records have been noted without a very strict attention to the question. I have, in the Cycle, mentioned the many disagreements between the tints of stars as given by Sir William Herschel and myself; and the anomaly is partly accounted for by his peculiarity of vision, and the tone of metal in his reflectors. But I am at a loss why refractors should differ so widely as here shown; and therefore hope the subject will be more closely pursued than it has hitherto been. I am aware that the notations independently made at various epochs will vary in term, though to the observer's eye they may mean nearly the same tint; but some of the differences mentioned by Signior Sestini in his interesting Memoir are singularly striking. He says—“Now, beginning with the companion of y Andromeda, we have Smyth emerald-green and Sestini white; but Herschel and Struve at another date call it azure. Moreover, observing it again after a lapse of two years, and four years after Smyth, I |
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