944 EXPERIMENT STATION RECORD. 



composition ofthe plants, the ash often being doubled. Aliigli content of 

 snlplinric acid is associated with a deficiency of phosphoric acid, potash, 

 etc. Tlie eatingof plants charged with sulphurous fumes by animals may 

 cause trouble in connection with i)arturition or may result in a special 

 disease which Haubner has called the acid disease ("maladie acide"). 



Fleury lierger' claims that comfrey, hairy vetch, an. I Jjuthyrm 

 sjjhrstris are not worthy of the attention which has been given them 

 in recent years. 



KousseauMias made a study of intensive culture in some of the 

 French colonies, especially on the introduction of caoutchouc trees and 

 the best method of extracting their product. He has studied the 

 species adapted to cultivation, choice of soils, and collection and prep- 

 aration of the gum for market. 



C. riabot ' in his travels through Scandinavia traced the limits of 

 altitude for cultivated plants and forest products in Northern Scandi- 

 navia and adjacent regions. 



An interesting report has been made upon the development of the 

 experiment gardens of Tunis.' These include orchards and nurseries 

 for the culture of fruit and other trees, such as the grape, olive, carob, 

 eucalyptus, acacia, opuntia, etc., and fields for testing forage plants, 

 such as sulla and cereals, cotton, ramie, Rumex, etc. 



Special culture. — In addition to the special articles in Revue de Viti- 

 culture and Progres Agricole et Viticole there have appeared numerous 

 articles pertaining to vineyard management. Among these may be 

 mentioned those of Viala,^ who has experimented on the action of 

 different liquids when taken up by the grapevine. Perraud" has com- 

 pared the various systems of grape pruning. Rigaux' has conducted 

 fertilizer experiments, and Blin" won the agricultural prize of the 

 Society of Agriculturists {Societe des Agricultenrs) for his work on the 

 care of vineyards. Guillon'* has published a book on oriental vine- 

 yards, and liavaz one on American vines as grafting stocks. The 

 latter'" has also published an article on the renovation of vineyards. 

 Gervais" has published a book on the adaptation of grapes to calca- 

 reous soils and the renovation of vinej^ards on such soils, and Viala and 

 Ravaz'2 have published a treatise upon the same subject. 



1 Jour. Agr., 2 (1896), p. 785. 



2 Congrt'S Soc. Savants, Sec. Bot., 1896, pp. 44, 118. 



3 Rev. gdn. Bot., 8 (1896), p. 38.5. 



" Assoc. Fr. Av. Sci., Cougrcs de Carthage, 1896, p. 187. 



s Bill. Soc. Nat. Agr., 1896, No. .5, p. 311. 



•> Paris : Masson, 1896. 



' Les engrais de la vigne, Toulouse, 1896. 



« Bui. Soc. Agr. France, 28 (1896), pp. 617, 664. 



"Paris: Carre, 1896. 



'" Choix des portegreffes; Bordeaux: Firet, 1896. 

 " Paris: Masson, 1896; Bui. Soc. Agr. Frauce, 28 (1896), pp. 702, 739. 

 '- Paris: Didot, 1896. 



