442 Mr, Farcy's extended Scale 



is produced, is as the density of the body deflected to the density 

 of the medium in which it moves, and in the inverse ratio of the 

 squares of the distance from the centre. 



8. That it is the necessary tendency of the rotary motion to 

 give an equal momentum to the heterogeneous masses compo- 

 sing a planet and its atmosphere, while the whole are moving 

 with an equal velocity in the orbit. 



9. That all phsenomena of motion visible to beings who par- 

 take of the common motions of a planetary system, are either 

 tlic relative motions of distant orbs, or the disturbance of the 

 great common motions by new directions of motion produced by 

 some muscular, mechanical, explosive, or chemical force. 



10. That these temporary and novel directions of force and 

 motion are speedily extinguished by the great permanent forces 



moving in other directions, all traceable to the phenomena, and 

 producing compositions of motion which result from the known 

 laws of dynamics. 



11. That of course similar motions produce similar phaeno- 

 niena in all planetary bodies. 



12. That, therefore, the phsenomenon hitherto ascribed to an 

 occult power called gravitation, is a simple result of known mo- 

 tions. 



The application of these principles to the phsenomena of a 

 s)stem of bodies moving within the gaseous medium of universal 

 space, will be the object of some future paper. 



Holloway, JunelO, 1817. 



CI. On Mr. Liston's, or the Euharmonic Scale of Mu- 

 sical Intervals, extended according to his tuning Process, 

 from 59 ^o G12 Notes in the Octave; shoiuing thus, a Division 

 of the Octave into 612 equal Parts, or as nearly so, through- 

 out, as ExperimeJits in Harmonics, or the most refined mu- 

 sical Performances, seem to require. 



By Mr. John Farey, Sen. 



To Mr. Tilloch. 



Sir, — It has been truly remarked, that, " By stopping in the 

 investigation of any subject, short of its thorough or general in- 

 vestigation, we are liable to fall into the error, of mistaking par- 

 ticular cases, for general facts, and of too soon drawing con- 

 clusions, which on more matured consideration, require to be re- 

 called or amended." Thus it has in a small degree happened, 

 with regard to one of the positions respecting the Euharmonic or 

 Listonian Scale of Musical Intervals, in my paper on the Nomen- 

 clature of these Intervals, which you did me the favour to insert 



in 



