145^^ 



PI.ANTS YIELDING OILS, DYES, TANNINS, ETC. 



bending of osiers etc. In addition a course of basketwork has been 

 founded and three workrooms have been estabHshed for various kinds 

 of basket making. 



IV. For thirty years osier cultivation has been carried on in the depart- 

 ment Cote d'Or on soil which is not very damp and which is most unfertile. 

 The plantations occupy about 1500 acres. In 1913 the harvest was exceptional 

 in quantity and quality; this caused a considerable drop in the price offered 

 by buyers, which fell from £1 per cwt. to 9s od. or gs <^d per cwt. To remedy 

 this state of affairs, the producers decided to sell their osiers themselves 

 and to this end they formed the Co-operative Society of Aisrey . This society, 

 founded in August 1913, has 140 members, from 15 villages. The results, 

 have been as satisfactory as was hoped, and the drop in price was stopped 

 by the formation of the Society. 



CROPS YIELD- 

 ING OILS, DYES 

 AND TANNINS 



1081- Nitrogen Requirements of the Olive-tree. — .See No. 1068 of this Bulletin. 



1082 - The Dyeing Value of Some Indian Dye-Stufls. — srivastava, i. p. (Technolo- 

 gical Chemist, Cawnpore) in The Agricultural Journal of India, Special Indian Science 

 Congress Number, pp. 53-64. Calcutta and London, 1916. 



The following investigation into the dyeing values of certain natural 

 colouring matters still ttsed by native dyers was undertaken under the 

 orders of the Director of Industries, United Provinces. 



The colouring matters were tried on wool and cotton by some of the 

 more important methods of modern dyeing. The inquiry has so far been 

 prosecuted in regard to the following colouring matters ; 



(i) Harsinghar [Nyctanthes Arbor-trisiis). — The flowers of this 

 tree, which occurs in abundance in the United Provinces, contain a 

 beautiful yellow colouring matter soluble in water, also in alcohol. 



Harsinghar gives brilliant yellow shades with all mordants on wool. 

 On wool mordanted with bichrome and o:salic acid previous to dyeing a 

 beautiful brown is obtained. The dyeings on wool possess good fastness 

 to milling with soap and soda. 



(2) Tun {Cedrela Toona) . — This tree is said to occur largely in the 

 sub-Himalayan forests. The colouring matter is contained in the flowers 

 which are dried and sold. The principal constituent of the flowers is a 

 yellow dye. 



Tun dyes the best shade on wool which has been previously mordanted 

 with aluminium sulphate and tartar. The dyeings on wool are, however, 

 not very fast to milling with soap and soda. 



(3) TESuorDHAK [Butea jrondosa). — This tree is found in abund- 

 ance all over the United Provinces. The flowers contain a yellow colour- 

 ing mattei . 



Tesu dyes on wool shades varying from brown to dull crimson accord- 

 ing to the moidant used. The dyeings are fairly fa.st to milling. 



(4) Hai.di or Turmeric {Curcuma longa). — The plant which 

 yields haldi is grown all over the United Provinces. Haldi is a dried rhizome 

 or tuber and is a well-known constituent of curry powder. It contains a 



