218 



MR. ALFRED BROTHERS S 



25 Canum Venaticorum. S 1768, 



E. A. (i860), 12^ 29™ 54^ 

 Dec. N. 37° 11'. 

 Mags, a =5'7, b =7-6. 

 Colours: Struve, white, Ijlue. 



Struve. 

 Madler 

 Dawes. 

 Secchi . 

 Dawes. 



Epoch. 



P. 



D. 



1831-51 



76-50 



'1-07 



1839-25 

 1854-43 

 1856-48 

 1865-44 



71-30 

 36-26 



2575 

 round 



1-06 

 0-35 



S 1785 BooTis. 



R. A. (i860), 13142^48^ 

 Dec. N. 27° 41'. 

 Mags. « =7, i =7-|. 

 Colours: Secchi, 1856, both white. 



Struve , 



Madler 



Secchi , 



Morton ..,., 



Main 



Denibowski 



1830-12 



164-43 



1840-85 



172-10 



1856-36 



185-97 



1859-29 



185-24 



1863-31 



I9I-I5 



1864-97 



192-41 



3-4» 

 3"47 

 3-24 

 2-89 

 2-78 

 2-6o 



S 1819 ViRGINIS. 



R. A. (i860), 14I1 8™ i8^ 

 Dec. N. 3° 47'. 

 Mags, a =7i, 6 =8. 

 Colours: Secchi, 1859, both white. 



Struve. 



Dawes 



Secchi 



Denibowski 



1830-39 



84-90 



1836-43 



76-12 



i843'34 



61-92 



1859-45 



39"45 



1863-01 



32'35 



TT BOOTIS. 



S 1864. 



1-12 

 1-02 



I'OO 



1-29 



S 1830 BooTis. 



R. A. (i860), 141 11™ 12^. 

 Dec. N. 57° 19'. 

 Mags, a =8|, b —g. 

 Colours: Secchi, i860, white, blue. 



Struve.. 

 Madler 



Socchi 



1830-89 

 1838-19 

 1860-06 



264*00 

 267-60 

 278-23 



4-84 

 5-" 



5'3o 



R. A. 14^1 34m 22^. 



Dec. N. 16° 59' 57S. 

 Mags. « =3^, 6 =6. 

 Colours: Smyth, 1836, both white. 



Herschel. 

 South .... 

 Struve.... 

 Smyth.... 

 Secchi . 

 Morton . 

 Main .... 

 Romberg 

 Kaiser 



Epoch. 



P. 



D. 



177972 



96-28 



6-17 



1822-05 



97-53 



6-90 



1830-32 



99-20 



S-«3 



1836-51 



99-30 



6-00 



1856-79 



100-93 



5-97 



1857-34 



100-36 



6-13 



1861-31 



ioo-8o 



6-18 



1863-27 



101-82 



6-01 



1866-45 



100-60 



573 



S 1876 L1BK.E. 



R. A. (i860), 1411 39™ qs, 

 Dec. S. 6° 48'. 

 Mags, a =8, b =8. 

 Colours: Secchi, 1856, both white. 



Struve 1832-33 51-73 i-i8 



Secchi 1856-87 60-84 i-oo 



Dembowski .. 1863-39 65-87 1-20 



6 BOOTIS. 



•2 1877. 



E. A. 14.^ 39™ 5^ 



Dec. N. 27° 38' 40". 



Mags, a =3, b =7. 

 Colours: Smyth, 1838, pale orange, 

 sea-green; Webb, 1850, light yell., 

 greenish; Main, 1862, orange, 

 greenish; Secchi, 1855, yell., blue; 

 Sti-uve, 1856, yellow, blue; Dem- 

 bowski, 1865, yellow, blue. 



Herschel. 

 Struve.... 

 Smyth.... 



Secchi 



Main 



Dembowski 



Dawes 



Secchi 



1779-67 



301-34- 



1829-39 



320-58 



1 8 3 1 -46 



321-60 



1848-54 



322-10 



1855-37 



323-58 



1862-39 



324-24 



1864-81 



324-70 



1865-48 



325-50 



1865-48 



324-70 



4-00 

 2-64 

 3-20 



2-80 

 2-60 

 2-60 

 2-71 

 2-92 



3-29 



Orbital period about 980 years, 

 Smyth. 



