THE GROWTH OF COAL. 



DEDICATED TO THE MEMORY OF 

 DR. SCHIMPER, 



OF STRASBURG, 

 THE AUTHOR OF "LA FLORE DU MONDE PRIMITIF," AND 



MANY OTHER CONTRIBUTIONS TO FOSSIL BOTANY, 

 AND OF 



DR. H. R. GOEPPERT, 

 WHOSE ESSAY ON THE STRUCTURE AND FORMATION OF COAL 



WAS ONE OF MY FIRST GUIDES IN ITS STUDY. 



