812 



Prof. A. Taber Jones on the Motion of a 



cases the end of the second parabolic arc is tangent to the 

 circle, and in three of them the end of the third parabolic arc 

 is tangent to the circle. In the second class there are the 

 eleven cases shown in fio\ 3. In one of these cases the end of 



Fig. 3 [First Part], 



a-55'44" 



g = 3!*4! 



a = 57'5l' 



a = 62°34-' 



a = 50* 13' 



Fig. 3 [Completed]. 



a = 57 a 26' 



a = 57° 52' 



a-58'lS' 



a=;64°40' 



o^rse- 



the first parabolic arc is perpendicular to the circle, in three 

 the end of the second parabolic arc is perpendicular to the 

 circle, and in seven the end of the third parabolic arc is 

 perpendicular to the circle. In two of these cases the com- 

 plete figure has not been drawn. In these two cases it 



