276 Forestry Quarterly. 



the maximum resistance to storm, snow, frost, insect depreda- 

 tions, etc. Especial attention is to be given to the selection of the 

 seed trees both as regards species and individuals. 



Berwirtschaftiing der Hochgebirgsforste. Allegemeine Forst- und Jagd 

 Zeitung. March, 1913. Pp. 93-95- 



A. B. R. 



Schiflfel's law, which he formulated as the 



^ ^ . result of his work in the preparation of 



Form Quotient . ^ ,. , o i. u r)- 1 u 



. volume tables for bcotch rme, larch, 



TT J J Norway Spruce, and Silver Fir, that trees 



which have the same diameter breast high, 

 the same height, and the same ratio between 

 diameter breast high and diameter at the middle height of the 

 tree must have approximately the same volumes, has been tested 

 in several other countries. A Swedish forester, Maas, has 

 proved the same law for Swedish Scotch Pine and a Russian 

 forester, Tkatchenko, has proved that the same law holds true of 

 the conifers of northern Russia. Mr. Tkatchenko, however, 

 went even further than Schiffel and Maas. Schiffel was of the 

 opinion that his law applies only to the conifers which have a 

 more or less symmetrical form but would not apply to the hard- 

 woods which do not follow any defined symmetry. Mr- Tkatch- 

 enko tested this law on a number of hardwoods grown in the 

 prairies and found that it applies very well also to the hardwoods. 

 The article is devoted to a review of the results obtained by 

 Schiffel and Maas and a comparison with the data obtained by 

 Tkatchenko on the Scotch Pine in the northern provinces of 

 European Russia and with the volumes of hardwoods secured in 

 southern Russia. As a resume of the work of his predecessors 

 and the development of their ideas further along the same line, 

 this article deserves the most serious attention of American 

 foresters, since in this country w^e are now preparing volume 

 tables. Although a large number of such tables have been pre- 

 pared for the most important species, yet the work is hardly 

 begun as in order to be of practical application the volume tables 

 must be local. There is a great field, therefore, for testing this 

 law on the American species as the gain if this law proves of 

 practical application will be very great in this country. 



