478 • JOURNAL OF FORESTRY 



ing of woodlot products, the properties of woods, and methods of 

 preservative treatment are other subjects considered. In the appendix 

 the author suggests a hst of practicum exercises that could be given 

 in connection with a course in farm forestry, describes a method of 

 finding the area of a woodlot by the use of an ordinary compass, and 

 includes a few tables. 



The method described of finding the area of a woodlot is very 

 simple in so far as running the compass-line around the woodlot and 

 drawing the map are concerned. In computing the area from this 

 map, however, the author has recourse to dividing it into a large num- 

 ber of squares. While correct, this method makes the problem more 

 complicated than is necessary. Instead of computing the area by these 

 squares, it would have been much simpler to have divided it into two 

 triangles and computed the areas of these. 



The tables include the Scribner and Doyle rules for determining the 

 contents of logs, the area of circles in square feet, and volumes in 

 board or cubic feet of several species of Eastern trees. The log rules 

 and volume tables are doubtless intended principally for illustration, 

 since they by no means cover the field to which the text applies. 



The book is rather abundantly illustrated, although a number of 

 the illustrations are not especially suggestive or representative of 

 woodlot conditions. The author does not claim originality for the 

 material, and, in fact, practically all the information presented is avail- 

 able in other publications. He states that the aim has been to bring 

 together in available form ideas and principles already well known. 

 In doing this he has performed a service which will be appreciated, 

 particularly by those teaching elementary courses in forestry, in that 

 the book will serve admirably as a text for students and also as a 

 guide for somewhat more comprehensive lectures. C. R. T. 



The Trees of Vermont. By G. P. Bums and C. H. Otis. Bulletin 

 194, Vermont Agricultural Experiment Station. Burlington, Vt. 

 March, 1916. Pp. 244. 



This is a descriptive bulletin written primarily for public school 

 pupils and others not specially trained in botany. 



It is very largely a reprinting of a handbook on Michigan trees, 

 issued by the same authors in 1913, with modifications to suit the 

 Vermont flora. Following introductory remarks on the study of trees 

 and use of artificial keys come generic keys (both summer and winter 



