Natural Sttccession of Forest Trees in North America. ^'21 



stead of the partition {Jigs. 85. m and 88.) between the pit and 

 ii^qo 



1)97; 9 



.t. 



the pinery being brickwork, the upper part of it, viz. that 

 above the tan, consists of a long door hung horizontally on 

 hinges, and made to fall back on the flue in the pinery, for the 

 sake of admitting the heated air of the pinery into the pit, 

 whenever the severity of the weather renders it necessary. 



The Green-house is formed by using the vinery, in the winter 

 time, for the purpose of preserving green-house plants. 



Art. XIV. 



Sir, 



On the Natural Succession of Forest Trees in North 

 America. By J. M. of Philadelphia. 



In Vol. III. p. 351. an extract is given from Evelyn's let- 

 ter to Sir John Aubrey, stating that beech trees grew in place 

 of oaks which had been cut doAvn by his grandfather, and that 

 birch succeeded beech which his brother had extirpated. In 

 the United States the spontaneous succession of timber, of a 

 different kind from that cut down, is well known. In the 

 Memoirs of the Philadelphia Society for inomoting Agriculture^ 

 vol. i., there are several papers on this subject, by the presi- 

 dent, the late Richard Peters ; by Dr. Mease ; by Mr. John 

 Adlum, who had long been a surveyor in the new settlements 

 in Pennsylvania ; by Dr. Caldwell, in reference to the fact in 

 North Carolina, in Massachusetts, and in New Jersey ; and a 

 confirmation of it in the last-mentioned state, by Mr. Tho- 

 mas F. Leaming. In the third volume, Mr. Isaac Wayre, 

 son of the American general the late A. Wayre, also gives 

 some interesting details respecting the appearance of timber 

 trees, of a kind different from those which formerly covered 

 the ground in his vicinity, and which had been cut down by 



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