42 NATURE-.STUDY REVIEW [14:1— Jan., 1918 



int ended theHawthorns to show that He could create a species in which no two 

 individuals need be alike.) Mr. Mathews has dealt in a like masterly manner 

 with the many puzzling species of Willows. 



The volume is superbly illustrated; it contains 16 full-page illustrations in 

 water color and 50 in green crayon, all showing the characteristic forms of trees. 

 However, of far more importance in identifying species, are the pen drawings of 

 leaves and fruits of which there are a very large number and which will demon- 

 strate again to an admiring public Mr. Mathews' accuracy and skill as a 

 natural history artist. At the end of the volume are 36 pages of maps showing 

 in a graphic manner the distribution of tree species. Following these are maps 

 showing the lands of the U. S. almost exlucively in private hands, one showing 

 the altitudes in the U. S. ; one showing the geological structure as a foundation 

 for a character of different soils; one showing the soil characters and others 

 showing the mean temperatures of the U. S. in January and July. The book 

 begins with a key for the identifications of species by the leaves and ends with a 

 key for the identification of the trees by the character of the bark, the latter 

 being helped by 1 8 photographic illustrations. The size of the book which is 

 4 by 7 by 1 inches is most convenient for carrying on field excursions and there 

 is a vast amount of information packed into its small compass, and fits it in 

 every respect to be what it is "Special Edition for Members of the American 

 Forestry Association." 



Message No. 3 — Courage. Message No. 4 — Little Lights, published TheTrotty 

 Veck Messengers. Saranac Lake, New York. Single copies not for sale 

 Two copies, 25c. Ten copies, $1.00. 



Again there comes to us messages from these brave young men who are in 

 temporary exile while gaining health from tuberculosis. These two booklets 

 are overflowing in the courage and cheer. Nothing could be more helpful, sent 

 as a New Year's Greeting to friends, than one of these books, especially this 

 year when we all need fresh courage : "Remember the steam kettle — tho' up to 

 its neck in hot water it continues to sing." "The world moves from West to 

 East. Trotty says if you do not like it get on the moon: it goes the other 

 way." "Evil thoughts like green apples upset the whole system." 



By all means send for some of these booklets and pass them around — 

 They will help! 



