PROCEEDINGS OF THE POLYTECHNIC ASSOCIATION. 681 



TABLE 3. 



Relative orbital velocities of the satellites of Jupiter. 



Theoretical Actual 



velocities. velocities. 



Miles per Lour. Miles per hour. 



l._Velocity of lo 38,772 38,772 



Subtract 7,000 



2._Velocity of Europa 31,772 30,716 



Subtract 7,000 . 



3._Velocity of Ganymede 24,772 24,513 



Subtract 7,000 



4._Velocity of Callisto 17,772 17,743 



TABLE 4. 



Relative orbital velocities of the satellites of Saturn. 



Theoretical Actual 



velocities. velocities. 



Miles per hour. Milea per hour. 



l._Ve]ocity of Mimas 34,986 34,986 



Subtract 714x5= 3,570 



2,_Vclocity of Enceladus 31,416 30,975 



Subtract 714X5= 3,570 



3._Velocity of Tethys 27,846 27,776 



Subtract 714X5= 3,570 



4._Velocity of Dione 24,276 24,516 



Subtract 714x5= 3,570 



5.— Velocity of Khea ..- 20,706 20,763 



Subtract 714X10= 7,140 



6.— Velocity of Titan 13,566 13,635 



Subtract 714X2= 1,428 



7._Velocity of Hyperion 12,138 12,215 



Subtract 714X6= 4,284 



8._Velocity of Japetus 7,854 7,968 



