ARTIFICIAL CHELTENHAM WATER. 1 39 



ANNOTATION. 



We assert, that the gravity of a body, is as its mass, and Iner'ia ccm^i- 

 fhat its mass is as its inertia, or the power by which it tends ria ^ e< 

 to preserve its state as to motion. Admitting or assuming 

 the inertia to be invariable, we deduce, that gravitation va- 

 ries inversely as the square of the distance between gravi- 

 tating bodies; and our observations on the relative situations 

 and motions of the heavenly bodies show, that this is the 

 case; or else, that, if the inertia be subject to variation, its 

 changes are such as to produce, along with some correspon- 

 dent opposite change in gravity, a result of the same kind, 

 as was accounted for on the supposition that the inertia does 

 not vary. But we seem to have no decisive facts to deter- But decisive 

 mine as to our original hypotheses, and therefore prefer the fa ^ ts are want " 

 simplest. Though the author of the preceding letter ap- 

 pears to have confounded the terms gravity and inertia; yet 

 the experimental speculation, to which his letter points, ap- 

 pears to be of sufficient interest to lead to meditations of so that there is 

 some value, and to authorize its insertion in our Journal. ™°™ for m ~ 

 W. N . 



VII. 



j4n Account of a simple and economical Method of preparing 

 an artificial Cheltenham Water highly impregnated with 

 Carbonic Acid (fixed Air). By Richard Greene, Esq. 

 pfCork, A.B. Trin. Col. Dub., M.D., and President of 

 the Royal Medical Society Edinburgh. 



To Mr. NICHOLSON. 

 SIR, 



I 



F vou think the following communication merits a place „, , 



i ii t I*- e .i * • , Cheltenham 



in your valuable Journal, it is periectly at your service, and water of high 



]by its insertion you will confer an obligation on repute. 



Your most obedient humble servant, 

 Edinburgh, Dec, 27, 1808, R. G. 



The purgatiye and chalybeate waters of Cheltenham have 

 long and deservedly been celebrated, in the cure of many 

 obstinate and alarming diseases. The chief obstacles to 

 their more general employment seem To be, the impossibi- 

 lity 



