STORES AGRICULTURAL EXPERIMENT STATIOX. 309 



terms used in their description. The keys in conse- 

 quence have been considerably modified before final paging. 

 Many of the explanatory phrases which may appear to 

 be unnecessary have been inserted at the demand of the students. 

 Where possible the most obvious characters have been employed 

 and though the keys in consequence have become somewhat more 

 cumbersome it is hoped they will prove more usable. Errors 

 and omissions have no doubt crept in despite the efforts to avoid 

 them. We would be grateful for any additions or corrections that 

 may be suggested in the descriptions or keys in view of a possible 

 revision of the text. 



The photographs of the twigs and of the fruit of the deciduous 

 trees are very nearly natural size. They have been slightly reduced 

 in production but all of them to the same scale, except the 

 fruits of the Catalpa, the Chestnut, and the Honey Locust as 

 indicated under these species. Line drawings or touched- 

 up photographs would no doubt show important details 

 more clearly by emphasizing certain of the minute markings. 

 Since, however, these details are often obscure, and moreover receive 

 full recognition in the accompanying text, it has been thought that 

 a truer idea of the twigs would be gained if they were left as they 

 appeared in the photographs. Accordingly, they have not been 

 "doctored" in preparation or reproduction. The leafy twigs of the 

 cone-bearing evergreens have been more or less reduced as indicated 

 under the descriptions of the genera in the key. All the twigs 

 of a single genus, however, are on the same scale. 



LITERATURE 



The following is a list of books which will be found useful 

 to the student of New England trees. They have been freely 

 consulted, as well as others not listed, and have been of value 

 in determining the ranges and wood characteristics of the indi- 

 vidual species, in confirmation of bark and habit characters, and 

 to a less degree of the other winter features. The dimensions of 

 the trees in the heading "Habit" and the information under the 

 heading "Distribution" have been taken with little change from 

 Dame & Brooks' Handbook, except what is given in the subhead- 

 ing "In Connecticut" which was obtained from the catalog of 

 the flowering plants and ferns of Connecticut; Bulletin No. 14, 



