566 Forestry Quarterly 



In another place the difficulty in securing tan material is dis- 

 cussed, and that of hides, seriously damaging the leather in- 

 dustry, worth $160 million, which largely relied on importation. 



The absence of important tan materials, of which $10 million 

 were required in 1913, has revived the price obtainable for oak 

 from the tan bark coppice woods of the Rhine country. While 

 in 1914 the hundredweight of bark brought only 75 cents, in 1915 

 the price had crept up to $2.50. 



A special organization "Kriegs-Leder Aktiengesellschaft" was 

 formed in Berlin in November, 1914, to insure the requirements 

 of leather for the army, the company in which the government is 

 represented working without expectation of financial gain. 



The forest administrations are called upon to save all tan 

 barks, especially oak and spruce, the brush of the latter being 

 especially fit for extract. Extract factories, using various woods, 

 have been established. A new process of peeling oak outside the 

 sap season has been devised. 



It is calculated that from the regular felling budgets and thin- 

 nings in spruce forest alone 7,000,000 hundredweight of bark 

 with an average of 10 per cent tannic acid can be recovered, or 

 700,000 hundredweight of acid, while the importations amounted 

 to less than one million. It is suggested that this necessity for 

 securing home tan supplies may lead to a new or revived direction 

 of utilization, 



Forstwissenschaftliches Centralblatt, May, 1915, pp. 231 ff. and 206 ff. 



MISCELLANEOUS 



Under the title "The Place and Impor- 

 Borggreve tance of Borggreve in Forestry," Dr. Mar- 



in tin, of Tharandt, the Saxon forest academy. 



Forestry discusses very readably the literary attain- 



ments of the late Borggreve. It is not a 

 eulogy, but a critical review of his work along the lines of 

 silviculture and management. 



Summing up, Martin says : "In looking back over the mani- 

 fold mental activities of Borggreve, there is one trait they have 

 in common, namely that in almost all important questions he was 

 in direct contravention to prevailing practice. This will be true 

 in the future, too. The method of natural regeneration which 



