REVIEWS 1027 



Finally, sulphate of iron applied in very small quantities to the plant 

 past the seedling stage, put on the surface and not in contact with the 

 roots, will stimulate woody growth. . . . 



The importance of these conclusions is sufficient to prove the worth 

 of the work of Chancerel. 



Some of the results obtained are surprising. Even though the benefi- 

 cent role of calcium fertilizers was known (Giersberg demonstrated it 

 for beech, and quite recently Cuif treated the subject in a more general 

 way) and the good effect of phosphate fertilizers was generally ad- 

 mitted, the disadvantages were not guessed of using in silviculture 

 nitrogenous and potash fertilizers, the majority of writers on the sub- 

 ject up to the present time having recommended their use; also one is 

 surprised to learn that maritime pine, known as a calcifugous species, 

 flourishes in an artificial soil saturated with calcium. 



Chancerel's book is very well arranged and perfectly presented. It 

 is illustrated by 52 well-chosen figures, of which about 20 are photo- 

 graphs of the plants, shoots, or slips in experiments, and 27 represent 

 cuts of wood showing the principal anatomical modifications as the 

 result of the mineral application. 



The National Society of Agriculture, in its formal public meeting of 

 January 12, 19 10, bestowed a gold medal on Chancerel for his remark- 

 able work on "The Action of Fertilizers on Woody Plants." 



All those who will read the book which I have just analyzed will 

 certainly acknowledge that this high recompense was well deserved by 

 the learned and conscientious author of a work of such importance and 

 merit. 



L. Parde. 



(Translated by Mathilde Ammen.) 



1. R. Hickel — Regarding Scotch Pine. Value of French Seed and 

 Plants. (A propos du pin sylvestre. Valeur des graines et des plants 

 frangais.)* 



2. Ph. Guinier — The Choice of Seed in Forest Culture. (Le choix 

 des semences en culture forestiere.)* 



The question of the influence of the origin of seed on the quality of 

 the tree is of great interest at the present time. It has been treated 

 during the past few years by numerous authors, notably by Cieslar in 

 Austria, by Mayr and Schott in Germany, by Engler in Switzerland, 

 and by Huberty in Belgium. In spite of that it is far from being solved. 



* "Revue des Eaux et Forets," Series 4, Vol. VIII. 



