292 Prof. P. E. Chase on Undulation. 



influence, in varying the direction of lines of magnetic force, 

 to magnetic bodies. 



Again, I have spoken distinctly and easily with telephones 

 without any permanent magnet whatever, the core of the coil 

 being of soft iron ; but this effect was probably due to the 

 impurity of the iron, residual magnetism remaining in it. Dr. 

 Blake, of Boston, has spoken easily when the core was a piece 

 of soft iron placed in the direction of the dip. 



XLI. On the Nebular Hypothesis. — VII. Undulation. By 

 Pliny Eakle Chase, LL.D., S.P.A.S., Professor of Phi- 

 losophy in Haverford College. 



[Continued from vol. iv. p. 298.] 



THE combined influences of aethereal or quasi-sethereal 

 action and reaction, elasticity, density, and fundamental 

 velocity, in the arrangement of the Solar System, are shown by 

 the symmetrical formula 



/ > + /*M A Tl ' = Pl±p\. m m n\ 



and by the equations, 



(ggjVfr ^X, (2) 



(|)VM=X, (3) 



- = 5T x2», (5) 



P Aj 

 /*2 



£-(£)'** (6) 



I? = ^x 1-061 (7) 



In these equations /jl = mass of Sun ; ^ = mass of Jupiter ; 

 fi 2 = mass of Earth; X = average velocity of complete solar dis- 

 sociation = 214-86 p-=-497-825 = velocity of light; Xx = 2v/#p 

 ■= 2 x velocity of incipient dissociation at Sun's surface = mean 



