564 Forestry Quarterly. 



Not only has the sequence of chapters been changed but the 

 resume of working plan procedure in the various states has been 

 brought to date. This covers the states of Germany and Aus- 

 tria. The latest development in Prussia is the complete aban- 

 donment of the "framevi^ork" methods of regulating the yield 

 and the substitution of the Age Class Method. The Bavarian 

 instruction of 191 1 and the Badensian ones of 1912 are briefed, 

 but the preliminary revision of the Wiirttemberg instructions 

 (1911) is not mentioned. 



The chapter on Methods of Yield Determination has been re- 

 arranged. Following an interesting historical sketch of the de- 

 velopment of the various methods, these are divided into 5 

 groups: 



1. The volume methods. 



2. The Normal Growing Stock Methods ("Formula" Methods) 



3. The area methods. 



4. The period ("framework") methods. 



5. The age class methods. 



Acquaintance with this volume of Lorey's Classic is to be 

 urged upon those who want first-hand knowledge of the advances 

 in German forest operation (Forstliche Betriebslehre). 



Forest Protection in Canada, IQ12. By Clyde Leavitt. Com- 

 mission of Conservation. Ottawa, Canada. 1913. Pp. 174. 



This volume represents the first annual report of the Chief 

 Forester of the Commission, whose energies have been largely 

 •directed to the problem of protection from railway fires. 



The first forty pages deal with the work done along this line. 

 'The history of the steps leading up to the issuance of the well- 

 known order of the Board of Railway Commissioners for Canada 

 on 22 May, 1912, for protection from railway fires, is given. The 

 regulations of the order deal with the use of fire protective appli- 

 ances on locomotives, the establishment and maintenance of a 

 staff of fire-rangers for special patrol, the regulation of locomo- 

 tive fuel, the clearing of rights of way, the financial responsibility 

 of railway companies for fire damage, and the construction and 

 maintenance of fire guards along railway lines. These regula- 

 tions easily comprise the most extensive and most efficient pro- 

 visions in America for the prevention and control of railway 



