64 FORESTRY [Bot. Absts., Vol. IV, 



423. Fernald, M. L. Lithological factors limiting the range of Pinus Eanksiana and Thuja 

 occidentalis. Rhodora 21: 41-67. 1 fig. March, 1919.— Bot. Absts. 4, Entry 283. 



424. Fischer, E. Neueres iiber die Rostkrankheiten der forstlich wichtigsten Nadel- 

 holzer der Schweiz. [Recent information about important rusts of conifers of Switzerland.] 

 Schweiz. Zeitschr. Forstw. 49: 113-120. 1918.— See Bot. Absts. 3, Entry 713. 



425. Friedrichs, Oscar v. Undersokning over feta koniferoljor. [Investigations of 

 fatty conifer oils.] I. Undersokning av tallfroolja. [Investigations of pine seed oil — Pinus 

 silvestris L.] Svensk Farm. Tidskr. 23: 445-451, 461-463. 1919.— The author investigated 

 the fatty oil content of the Swedish grown Pinus silvestris L. and includes a table for compari- 

 son of the physical properties of these oils with those reported by Grimme in Germany and 

 DeNegri and Fabris in Italy. — The fatty oils described in this paper consist of volatile and 

 nonvolatile fatty acids (both saturated and nonsaturated), glycerine and a phytosterin. The 

 nonvolatile fatty acids compose 90.4, the volatile 0.11, the glycerine 7.5 and the raw phyto- 

 sterin 1.29 per cent of the fatty oils. Of the fatty acids 3 per cent are solid, and 97 per cent 

 fluid. The solid fatty acids consist of 5 per cent Stearic and 95 per cent Palmitic. In the case 

 of the unsaturated fatty acids 36.2 per cent is Oleic, 56.2 per cent Linolic, and 7.6 per cent 

 Linolenic acid. The undistilled residue is a phytosterin which is presumably sitosterin. — 

 A. M. Hjort. 



426. Friedrichs, Oscar v. Undersoknlngar over feta koniferoljor. [Investigations of 

 fatty conifer oils.] II. Undersokning av granfroolja. [Investigation of spruce-seed oil — Picea 

 abies Karsten.] Svensk Farm. Tidskr. 23: 500-505. 1919. — The author investigated the 

 fatty oil content of the seeds of Swedish grown spruce — Picea abies Karsten, and includes in 

 this paper a table comparing the results he obtained, pertaining to the physical properties, 

 with those reported by Grimme in Germany and DeNegri and Fabris in Italy. — The fatty oils 

 consist of volatile and nonvolatile fatty acids, both saturated and unsaturated; glycerine and 

 raw phytosterin. The nonvolatile fatty acids comprise 91.6 per cent, the volatile (Butyric 

 acid) 0.14 per cent, the glycerine 7.5 per cent and the raw phytosterin 1.37 per cent of the 

 fatty oils. — The nonvolatile fatty acids consist of 0.70 per cent saturated and 99.3 per cent 

 unsaturated acids. Of the saturated fatty acids palmitic acid is the only one present. Of 

 the unsaturated fatty acids 42.75 per cent is Oleic, 49.55 per cent Linolic and 7.7 per cent 

 Linolenic acid. — The undistilled residue' consists of a phytosterin which is presumably iden- 

 tical with sitosterin. — A. M. Hjort. 



427. Fuller, George D. Our national forests. [Rev. of: Boerker, Richard H. D. 

 Our national forests. 238 p. SO fig. Macmillan Co.: New York, 1918. (See Bot. Absts. 2, 

 Entry 917.)] Bot. Gaz. 67: 369-370. 1919.— The author "has collected and organized a mass 

 of scattered data and presented them in very readable form." The timeliness of the book is 

 noteworthy, as we are just entering upon a period of appreciation of our forest wealth. Weak- 

 nesses of the book are seen in the absence of a bibliography or of a suitable index. — H. C. Cowles. 



428. Geete, Erik. Sagkamraten. [A saw-companion. 1 Skogen 6: 142-145. Fig. 1-6. 

 1919. — Description of a device for assisting in the operation of a one-man saw. It consists of 

 a large coil spring, one end of which is attached to the tree and the other to the back of the 

 saw. When the saw is drawn toward the operator the spring is stretched out ; when the pull 

 is relaxed the spring recoils and pulls the saw back on the reverse stroke. — G. A. Pearson. 



429. Girard, E. Notes sur la culture de l'Hevea en Cochinchine. [Notes on the culti- 

 vation of Hevea in Cochinchina.] Bull. Agric. Inst. Sci. Saigon 10: 289-299. 1919. 



430. Graves, II. S. A policy of forestry for the nation. Amer. Forestry 25: 1401-1404. 

 1919. — A statement, more comprehensive than heretofore made by the writer, setting forth 

 the objectives of a national forest policy and the steps to be taken to attain them. — Chas. H . 

 Otis. 



