Current Literature 293 



as to have the whole increment story in smallest compass handy 

 for use in determining rotations and other problems. 



Only one interest table, namely, for extension, is given, up 

 to 10 per cent. Whether it is worth while to give this in decimals 

 is open to question. The same space might have been more 

 usefully employed to introduce the usual discount, capitalization 

 and rent tables. 



Chapman's book in this respect is better and also adds extensive 

 logarithmic tables. 



In the use of the formulae, Roth gives the advice (p. 13, foot- 

 note) to write i.op-i, in order to recall the derivation of the ex- 

 pression. This seems gratuitous for it is just as easy and less 



cumbersome to see the derivation of — = C fromC "a = 100 '-P 



.op ' ' '^' 



The index to the 55 formulae developted by Chapman is useful, 

 but we believe that there is much unnecessary formula work 

 gone through in the volume. 



Finally, wc should mention approvingly the very desirable 

 teaching apparatus furnished by Roth in the 37 problems for 

 practice work. The execution of one or the other of these prob- 

 lems would render the book fit for self-study. 



B. E. F. 



Forest Legislation in America Prior to March 4, ijSg. By J. 

 P. Kinney. Bulletin 370, Agricultural Experiment Station, Cor- 

 nell University. Ithaca, N. Y. 1916. Pp. 359-405. 



This interesting study, compiled as a thesis for the degree of 

 Master in Forestry, has, to be sure, only historical value. It 

 tries to show that even before the formation of the Union atten- 

 tion was directed to "Conservation." The study is based on 

 original sources, which are cited by titles filling three pages. 

 The gist of the legislation is given under the name of each colony, 

 and is divided into four sections, namely, legislation regarding 

 forest fires ; regarding conservation and the prevention of tres- 

 pass ; regarding control of forest industries ; and regarding spe- 

 cial developments, such as control of sand dunes, control of river 

 driving, and cooperative forestry. 



