TRANSLATOR'S PREFACE. ix 



this branch of study, will find, in conclusion, that he 

 has learned somewhat of the great law of perpetual 

 motion and change in what he may have previously 

 deemed the immoveable crust of the earth. He will 

 have learned to regard the mystery of that movement 

 with a measure of the same awe that is inspired by a 

 study of the distant nebulae ; and he w ill have felt how 

 essential it is, in studies of this nature, to disembar- 

 rass his mind of ideas borrowed from limited views of 

 the measurements of time and space : 



God worketh slowly ; and a thousand years 

 He takes to lift His hand off 



MUSWELL Hll-L, 



January, 1870. 



