Letters to a Friend 



take it with you. It is entitled "Gordon's 

 Pinetum," published by Henry G. Bonn, Hen 

 rietta St., Covent Garden; Simpkin, Marshall 

 & Co., Stationers, Hall Court; 1875; second 

 edition. It is an "exhaustive" work, very ex 

 hausting anyhow, and contains a fine big much 

 of little. 



The summit pine of our Sierra is P. albicaulis 

 of Engelmann, and the P. flexilis Torrey, given 

 in this work as a synonym, is a very different 

 tree, growing sparsely on the eastern flank of 

 the Sierra, from Bloody Canon southward, but 

 very abundant on all the higher basin ranges, 

 and on the Wahsatch and Rocky Mountains. 



The orange book is, it seems, another exhaus 

 tive work. There is something admirable in 

 the scientific nerve and aplomb manifested in 

 the titles of these swollen volumes. How a tree 

 book can be exhaustive when every species is 

 ever on the wing from one form to another 

 with infinite variety, it is not easy to see. 



I have n't the least idea who Mr. Rexford 

 is, but, if connected with the "Bulletin," I can 

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