TRANSLA TOR'S PREFACE. 



Vli 



originals will appear by this process of re-translation. The 

 inverted commas, used to mark passages cited verbatim, have 

 generally been suppressed in such cases. 



With but two or three unimportant exceptions, the illus- 

 trations in this volume are identical with, or equivalent to, 

 those of the original work. The translator and the pub- 

 lishers desire gratefully to acknowledge the kindness of 

 Messrs. Blackie, in allowing the use of several cuts from their 

 excellent edition of Deschaners Natural Philosophy, namely, 

 those which appear in this volume as Figs, i, 2, 4, 5, 10, n, 

 12, 13, 15, 1 8, 38, and 72. A like acknowledgment is also 

 due to M. Werdermann for his permission to use the illustra- 

 tions forming Figs. 37 and 57. 



R. R. 



