GrORE — On Known Variable Stars. 201 



165. S Capeicoexi. — IN'ot in Schonfeld's Catalogue, but given by- 

 Chambers in bis Handbook of Descriptive Astronomy (p. 584, 3rd 

 edition). 



166. S Delphini. — Elements derived by Scbonfeld from bis obser- 

 vations of minima since 1865 ; but tbey sbowa marked fault up to 21 

 days, whicb seems to sbovr a shortening of the period. The irregu- 

 larities of the maxima are still greater, the star sometimes remaining 

 for a month without any well-marked variation of light. An 8'3 m. 

 star 7ip. 



167. T Delphini. — The Elements derived by Scbonfeld fix 5 ob- 

 served maxima since 1865 within 4|- days; but in 1867 the deviation 

 was about -27'8 days. Erom these observations, Scbonfeld also finds 

 the Elements : — 



Ep. E. = 1869. 4. 1 + 330^-7 E. 



Increase from 10 m. on the average 28 days, and decrease 49 days. 

 An 11m. star np. and a 10 m. nf. Scbonfeld calls its colour " stark 

 gelbroth." 



168. Tj Capeicoent. — According to Scbonfeld, the Kght variation 

 near the maximum is partly quick, and partly for a week long very 

 trifling. 



169. T Cygn-i. — From his own observations, Scbonfeld finds a 

 certain epoch for the maximum scarcely determinable ; but at the 

 minimum (Xovember to June), the star seems to vary much quicker. 

 From Schmidt's data, Scbonfeld derives the following formula : — 



Ep. E. Min. 1869. 12. 1, Max. 1870. 6. 8 + 365^ E. 



170. T AQiTAEn (= Lalas^de 40196). — The Elements derived by 

 Scbonfeld fix 4 minima since 1865 within 4 days, but six maxima 

 only with a regular fault up to 16 days. A period of 202-05 days 

 would represent an observation by Lalande, 1794, July 15, 7*8 m., 

 but is not in agreement with observations by Bessel, 1822, August 19, 

 and Lamont, 1844, October 3. 



171. Pb YiTLPECTJX^. — Frequently observed. The probable uniform 

 period is, according to Scbonfeld, 136-8 days ; but this gives a regular 

 fault up to 20 days, which be considers would be reduced below 7 

 days by the Elements : — 



137-5 E- 0-06 E^ 

 A 9-10 m. star w/. 



172. "W Capeicoexi. — Discovered to be variable by C. H. F. Peters 

 at Clinton, U.S.A., from observations, 1878-1880. He found the 

 star invisible in his telescope on the following dates : — 1878, August 



