78 FORESTRY [Bot. Absts. 



in 1906 are from 7 to 8 meters high. Douglas fir has done nearly as well, and other American 

 conifers have also given good results. Spruce has stood severe frosts without injury. — 

 W. N. Sparhawk. 



534. Fisher, M. L. The washed lands of Indiana: A preliminary study. Indiana (Pur- 

 due) Agric. Exp. Sta. Circ. 90. U p., 18 fig. 1919 —See Bot. Absts. 3, Entry 467. 



535. Fltjrt, Phillipp. Ueber Wurzelverwachsungen. [Natural root grafting.] Schweiz. 

 Zeitschr. Forstw. 70: 37-41. 1919. — Natural grafting of roots one or more centimeters in 

 diameter was found to be as common as the natural grafting of stems and branches, but no 

 grafting of smaller roots was found. In experiments, roots of spruce, pine, fir, beech, oak and 

 ash have been held in contact under pressure since 1912, but no grafting has occurred. — The 

 grafting of larger roots is explained by the fact that in these roots the cambium grows as in 

 branches and stems and consequently permits of union of growing cells by division from the 

 inside layer, while in the young root the growing cells divide in the outer layer and conse- 

 quently cannot form a union. It is also pointed out that the grafting of absorption roots 

 would be a disadvantage to the plant while the grafting of older roots would only tend to 

 strengthen the system of support roots. Author remarks that nature has possibly provided 

 the young roots with a repulsive power to react away from one another, as a stem is autotropic 

 while a root is geotropic. — J. V. Hofmann. 



536. Foster, J. H. [Rev. of Rankin, W. Howard. Manual of tree diseases. S98 p. 

 MacMillan Co., New York, 1918.] Jour. Forestry 17: 321. 1919. 



537. Guyot, Ch. Un projet de loi "tendant a la reorganisation generate de la police. 

 [A proposed law for the general reorganization of the police.] Rev. Eaux et Forets 57: 100- 

 103. 1919. — The Minister of the Interior has asked all the municipal councils in France for 

 suggestions on a proposed law which he plans to present to Parliament, transferring -to the 

 authority of the prefect the greater part of the police powers now exercised by the municipal 

 authority in accordance with the law of April 3, 1884, and organizing a rural police to replace 

 the present rural guards. The proposed law is of interest to foresters and forest owners 

 because it would afford better protection to private forests than the present system. — S. T. 

 Dana. 



538. Glover, H. M. Conversion of blue-pine forest to deodar in the Bashahr Division of 

 the Punjab. Indian Forester 45: 1-3. PI. 1-8. 1919.— The rapid growth of deodar (Cedrus 

 deodar a) following the removal of blue pine (Pinus excelsa) is described. — E. N. Munns. 



539. Grainger, M. A. British Columbia reduces fire hazards. Canadian Forestry Jour. 

 14: 152. April, 1919. — An abstract is given of the new fire law for British Columbia, together 

 with a brief description of activities in that province. — E. N. Munns. 



540. Hagem, Oscar. Fremmede traslag i vort lands skogbruk. [Exotic trees in our for- 

 ests.] Tidskr. Skogbruk 26: 363-375. Fig. 1-4. 1918. Calls attention to the need of more 

 extensive experiments with exotic conifers, particularly those from the northwestern United 

 States, Canada and the coast of Alaska. In these regions both temperature and precipitation 

 appear to be similar to those pevailing on the west coast of Norway. Extensive experiments 

 were begun by Borre Giersten in 1900-1903 with different exotics, but lack of knowledge of 

 their requirements and the difficulty of obtaining different planting sites have frustrated 

 most of the earlier efforts. The problem can only be approached, with any assurance of suc- 

 cess, by sending some one abroad to collect seed and to study the climatic conditions and the 

 distribution of the species intended for trial. — J. A. Larsen. 



541. Hagem, Oscar. Beretning fra vestlandets forstlige forsogsstation. [Report of the 

 Western Forest Experiment Station.] Tidsskr. Skogbruk 26: 392-395. 1918.— Anton Smittwas 

 sent to the United States and Canada to collect tree seed for trial in Norway. Forty pack- 



