By a necessity engendered and justified by sci- 

 ence, I cross the boundary of the experimental 

 evidence, and discern in that Matter which we, 

 in our ignorance of its latent powers, and not- 

 withstanding our professed reverence for its Cre- 

 ator, have hitherto covered with opprobrium, 

 the promise and potency of all terrestrial Life. 

 TYNDALL, Belfast Address. 



