Chemical Theory of Electricity and Magnetism. 79 



when at a distance by the intervention of their attractive or repul- 

 sive ethers. 



Thus have I endeavoured to take one step further back into the 

 mystery of the gravitation and repulsion of bodies, which appeared 

 to be distant from each other, as of the sun and planets, as I before 

 endeavoured to take one step further back into the mysteries of 

 generation in my account of the production of the buds of vegetables 

 in Phytologia. With what success these have been attended I now 

 leave to the judgment of philosophical readers, from which I can 

 make no appeal. 



