ON OCCULTATION, ETC. 



63 



The angle CSE+90 is the aiigle from the north point of the sun at which last contact 

 takes place. This angle measures 129J°. 



The foregoing quantities as given in the Nautical Almanac are — 



Eclipse begiiiB, 18 h. lOA ni. 



Greatest phase, 18 li. 4G m. 



Eclipse ends, 19 li. 23 m. 



Magnitude, 0-186. 



Angle from N. of first contact 158° W. 

 " last " 130° E. 



The unit of the scale here employed is one-sixteenth of an inch. A larger scale would 

 give greater accuracy. 



But, in general, the smaller the magnitude of the eclipse, the greater will be the 

 probable error of the prediction. 



TABLE I. 



Aryumenis, ep, â, a, q>\ d', «'. 



