18G 



PROCEEDINGS OF THE AMERICAN ACADEMY 



(4) 1874. Jan. 8. 13 h. 30 m. Procyon: examined carefully for about 20 min- 



utes, — distant companion plain. Seeing good, and rays 

 round star quiet : no small companion. Holden. 



(5) 1874. Jan. 14. 10 h. Very good seeing at times: ... no near companion to 



Procyon. Holden. 



(6) „ Jan. 25. Seeing very excellent : ... no near companion to Proc^/on. 



Holden. 



(7) „ Feb. 5. Procyon. Good seeing. Struve's companion not seen. 



Newcomb and Holden. 



Suspected a companion fol/oicing more distant tban com- 

 panion to Sirius. Position angle 76° or 77°, by rough 



■ sketcli. (See observations of Nov. 12, 25, and 20.) 

 Holden. 



(8) „ Feb. 14. Procyon : poor image. Holden. 



(9) „ Feb. 21. Gh. 15m. to7h. Procyon: distant companion plain. Procyon 



unsteady, and poor seeing : no suspicion of near com- 

 panion. Holden. 



(10) „ Mar. 11. Procyon; no near companion. Holden. 



(11) „ Mar. 20. 7 h. 30 m. Procyon: image good. Struve's companion not 



seen. G. W. Hough, Newcomb, and Holden. 



(12) „ Mar. 21. 7 h. 30 m. Procyon : no near companion. Holden. 



(13) „ May 18. About 8h. Procyon ; no near companion. C. H. F. Peters. 



(14) „ May 26. Procyon: aperture reduced to 15 inches. Image poor: no 



near companion. Newcomb. 



(15) „ Oct. 15. 17 ii. Siriiis : companion better seen with afuTture reduced 



to 22 inches. — Procyon : aperture 22 inches. Struve's 



companion not found. Definition fine. 

 17 h. 44 m. Distant companion can still be bisected with 



ease in -the increasing daylight. 

 17 h. 47 m. Bisection difficult, but companion plainly seen 



away from wire. 

 17 h. 51 m. Companion cannot be certainly seen at all. I 



am surprised at its sudden disappearance in the daylight. 



Newcomb. 

 [The sun was about 6° below the horizon at 17 h. 50 m.] 



(16) „ Nov. 7. Cambridgeport, Massachusetts. Using the McCormick 



telescope; aperture, 26^- inches. Seeing rcry good. Pro- 

 cyon ; no trace of Struve's companion. Alvan Cl.vrk, 

 G. Clark, and A. G. Clark. 



(17) „ Nov. 12. Procyon: seeing about the same as at Cambridgeport 



(Nov. 7]. No sign of Struve's companion. Observation 

 doubtful of a small companion 10" off, marked in drawing 

 position angle = 68° from sketch. Alvan G. Clark, 

 Avith 26-inch refractor at Washington. 



(18) „ Nov. 25. 14 h. 30 m. to 15 h. 10 m. Pror^/on ; seeing not jwy good. 



Struve's comi)anion not seen. Small companion sus- 

 pected, [p = 47° from sketch.] 



