POSITION or DOUBLE STAKS, 



213 



Theory of the 

 motions of the 

 ftar*. 



3d cafe. When the angle P a O is lefs than 90 degrees, the 

 following Table muft be ufed. 



i 



■ ^ Double Motions. 



No. 4. If we admit different motions in two of our three 



)dies!, and if the ratio of the velocities, the dire6tions of the 



lotions, and the ratio of the diftances of the bodies be given 



quantities, a fu]ppo(ition in which we admit their concurrence, 



may explain tlie phenomena of a double ftar, but can never be 



probable - 



Motions of the three Bodies. 

 No. 5. If we admit different motions in every one of the 

 three bodies, O «,, x, and if the velocities and directions of the 



motions^ 



