1046 EXPERIMENT STATION RECOED: 



Irish potato, and certain vegetables have given the best results, Lucern and the 

 Jerusalem artichoke also do well. 



Forest road building and the care of water in the Harz mountains, Kautz 

 (Ztschr. For.st u. Jagdw., 39 (1901), No. 10, pp. 639-658, figs. 13).— An account 

 is given of the laying out, construction, and protection, of wood I'oads in the 

 Harz mountains in northwest Germany, accompanied by plans of the road sys- 

 tems in that region. 



" Jiquie " rubber, O'Sullivan-Beare (Diplo. and Cons. Rpts. [London], 

 Ann. Sci:, 1901, No. 3901, pp. 15, 16). — In connection with a report on the ex- 

 port of rubber from the state of Bahia for the years 1904-1906, the author gives 

 an account of a new species of rubber which has lately been discovered in that 

 state and is locally Icnown as "Jiquie manicoba " and said to be a new and 

 distinct species of Manihot. It is said to occur in large quantities and its dis- 

 covery is considered of much importance both for Bahia and the rubber trade 

 In general, inasmuch as the rubber obtained from the Jiquie mani^oba appears 

 to be fully equal in quality to the best Para rubber. A description is given of 

 the tree together wnth its latex. 



The period for extracting the latex extends from August to :\Iarch. The 

 latex is said to possess the valuable property of coagulating spontaneously 

 when exposed to the air, requiring no acid or other artificial coagulant of any 

 kind. " It has been found fi-om experiment that the Jiquie manif;oba tree can 

 be made to yield its latex between the fourth and fifth years from time of first 

 planting, but the tree yields its maximum returns from the age of S years 

 onwai'ds." 



The consignment of Jiquie rubber recently classified in New York was con- 

 sidered equal to the best Para rubber, and brought $1.20 per pound. 



The production of rubber and the rubber trade in Bahia, E. Ule (Notizbl. 

 K. Bot. Gartens ii. Mns. Berlin, 5 (1908), Nrj. J,la, pp. 52, i)ls. 3, figs. 2, map 

 1). — The i)resent account is based upon the author's travels in Bahia, Some 

 general observations are presented relative to the country and its vegetation, 

 the various rubbei'-producing plants are described, and special notes with illus- 

 trations are given of several new kinds named by the author, including Jequie 

 manigoba (Manihot dicliotoma), M. dichotoma var. parrifolia. S. Francisco 

 maniQoba (.1/. heptaphyJta), and Piauhy manigoba (M. piaulujensis). 



Consideration is also given to the methods of harvesting rubber, yields, agri- 

 cultural conditions in the country, and rubber-planting oiierations. The author 

 is of the opinion that under suitable conditions the Bahia manicobas will re- 

 place the cultivation of Ceara rubber (.1/. gUizinrii), and that the cultivation 

 of M. piauhyensis and M. heptaphytJa is likely to become important on dry, 

 infertile soils, while Hevea brasiliensis is considered the imi»ortant source of 

 plantation rubber in the luxuriant tropical regions. 



Jequie manigoba and its allies (Roy.. Bot. Gard. Kew, Bui. Misc. Inform. 

 1908, No. 2, pp. 59-68, map 1). — The information collected at Kew since the 

 early jjart of 1900. relative to the botanical classification and value as rubber 

 jjroducers of the IManihot varieties in the state of Bahia is here given, together 

 with extracts from the reports of D, R, O'Sullivan-Beare and B. Ule noted 

 above. 



The tapping of Assam rubber (Ficus elastica), H, H, Mann (Agr. Jour. 

 India, 2 (1901), No. 3, pp. 211-219). — The author describes an improved method 

 of tapping rubber as adopted by W, Stiefelhagen in Cachar and gives the 

 results of some tapping experiments in which this method was used. 



The tapping instrument consists of an ordinary carpenter's chisel i to f in. 

 wide. This is driven into the bark vertically in a series of cuts, each the width 

 of the chisel, across the direction of the branch being tapped and with at least 



