INTRODUCTION. Xlll 



reserved until another volume, which is already in progress, be completed. The 

 author will then give the outline of a System, with observations on the Fossil 

 Plants of the Coal Formation, and on the System promulgated by Dr. Martins. 



The libraries and museums of the French nation, to which there is always 

 a free access, are an enviable acquisition ; and the author acknowledges the very 

 liberal conduct of those who have the care of them. When in Paris he was parti- 

 cularly indebted to the kindness of Baron Cuvier, M. Champollion, M. Arago, 

 and the Baron De Ferussac. 



The author cannot conclude without stating his further obligation for many 

 valuable hints, communicated by Professor Buckland, Dr. Noehden, Mr. Robert 

 Brown, and Mr. Samuel Frederick Gray, which were of essential service to him in 

 the composition of his work. 



E.T. A. 



Milton, Northamptonshire, 

 1st Sept. 1825. 



