Mr. Ray to Dr. Robinfon. 1 8 j 



ther, and fcarce poffible to be done but by an intel- 

 ligent Agent, which yet muft be done, to produce 

 like and homogeneous Textures. Therefore the moft 

 of thefe Differences muft arife from the Admixture 

 of heterogeneous Particles. The Fire is not fuch an 

 * Analyft, but that it doth communicate Particles to 

 the Bodies it divides or transforms, as we fee in Mi- 

 nium made of Lead, in which, that fome Parts out 

 of the Fire adhering to the Lead, do fo transform it, 

 appears probable by the Increafe of Weights and 

 many other like Inftances there are. 



That fix'd Salts are all alike, (whether they be 

 compound or fimple Bodies) I gather from the Im- 

 preflions they -make on our Senfes, and from their 

 Operations. Probable it is, that the heterogeneous 

 Particles may^ in greater Quantities, and more 

 clofely adhere to them in fome Vegetables, than in 

 others. 



In fine, that there are innumerable concrete Bo- 

 dies of the lame Figure, is evident to Senfe in the 

 Cryftals of Salts 5 that thefe particular Cryftals muft 

 be compofed of like-figured Particles, (one to ano- 

 ther, tho' not to the Concrete) and thofe again of 

 like, ufq\ ad minima^ is highly probable, if not de- 

 monftrable, in Reafon j whereas, were Bodies infi- 

 nitely divifibfe, and confequently of no certain Fi- 

 gure, (the Minima I mean) I do not fee how we 

 could ever come to fuch regular Concretions, at leaft 

 to fuch Multitudes andMafles of them : But that the 

 World muft have continued, as the Poets firft fan- 

 ded % a Chaos. But enough of this, 



Slack Notley, May n. 



Bb 



