NEW ORBIT OF THE DOUBLE STAR £416 = SCORPII 185. 



59 



Explanation of the Plate. 

 The two tufa deposits A, B, will probably prove to be a single 

 bed. In the section thin bedded sandstones crop out at A. A 

 coarse grained grit overlies the limestone at C. The limestone C 

 is at most twenty feet in thickness. The coarse grit above the 

 limestone contains abundant casts of corals allied to Cyathophyllum. 



NEW ORBIT of the DOUBLE STAR 0416 = SCORPII 185. 



By Prof. S. Glasenapp, Imperial Observatory, St. Petersburg. 



(Communicated by H. C. Russell, b.a., c.m.g., f.r.s.) 



[Read before the Royal Society of N. 8. Wales, June 6, 1894.'] 



Since I published in the No. 115 of the journal "Astronomy 

 and Astrophysics " the elements of the true orbit of 0416, I have 

 received from Mr. H. C. Russell, Government Astronomer for 

 New South Wales, a set of measures of this star made by Mr. R. P. 

 Sellors during the year 1893. With the kind permission of Mr. 

 H. C. Russell, I here reprint these observations : — 



Observations of /3 416 made by Mr. R. P. Sellors. 



Epoch. 



d 



Weight. 



P 



Weight. 



Star East of Meridian 



1893-493 



349° -9 



10 



0"'65 



10 



•528 



3486 



6 



0-82 



6 



,, „ 



•531 



347-7 



7 



0-73 



7 



,, ,, 



•597 



347-7 



6 



0-57 



4 



Star West of Meridian 



•608 



347-5 



5 



077 



5 



,• 



Mean: 1893-55 <9 = 348°-3 p = 0"-71 5 nights. 



These measures are of great value for the investigation of the 

 orbit ; and make it possible to obtain a new set of elements. 

 If we take into consideration these observations we obtain the 

 following elements : — 



