Algarobilla has been attributed to _Prosopis pallida_, but this appears incorrect. Several species of _P._ are known to yield tanning pods; those of _P. Stephaniana_ of the desert of Kaschan, in Persia, are _dschigh dschighe_, perhaps identical with _dchift_ or _jaft_. (See p. 263.) Bark of _P. spicigera_ used in Punjab. _C._ (or _Hæmatoxylon_) _campechianum_, Logwood, Central America. In addition to colouring matter, and a glucoside which it yields on oxidation, this wood contains about 3 per cent. tannin. Its principal use is in dyeing blacks with iron or chrome mordants. (See p. 413.) [Illustration: FIG. 58.[149]--Algarobilla (_Cæsalpinia brevifolia_).] [149] ‘New Commercial Drugs and Plants,’ No. 5, T. Christy. _C. echinata_ yields “Brazil-wood.” (See p. 413.) _C. Sappan_, Sappan-wood, India. _Cassia auriculata_, _Turwar_ or _Tanghadi_ bark, Southern India. Used for tanning so-called “Persian” sheep- and goat-skins, contains about 17 per cent. of a catechol tannin. Leather tanned with it is of a pale yellow colour, but rapidly reddens in sunlight. Cp. p. 235. _C. fistula_, India. Husk of pod, 17 per cent. tannin. The pulp of pod is used as an aperient. _C. elongata_ and _lanceolata_. Senna leaves. Upper Egypt. _C. Sophora_, “_Bali-babilan_.” [Illustration: FIG. 59.--Babool (_Acacia arabica_).] MIMOSEÆ, a Tribe of Leguminosæ. _Acacia arabica_, “Babool,” “Babul,” India, Egypt. Fig. 59. Bark contains about 12-20 per cent. of catechol tannin; one of the principal Indian tanning materials, used for kips and heavier leathers. Pods, used in India for bating, contain about same amount of tannin as bark, but of a different kind, that of the bark being a catechol-tannin, with a good deal of red colouring matter, while the pods contain a paler tannin allied to divi, which is not precipitated by lime-water. In Egypt the pods are called _bablah_, a name which is also applied to pods of _A. cineraria_ and _A. vera_, and others. They are used for dyeing glove-leathers. _A. nilotica_, Egypt. Pods called _neb-neb_ or _bablah_. [Illustration: FIG. 60.--Cutch Tree (_Acacia catechu_).] _A. catechu_, India. The wood yields cutch or “dark catechu.” A lighter coloured variety called _kath_, containing much crystallised catechin, is also made in India, and principally used for chewing with betel. _A. catechu_ is a tree 30-40 feet high, common in India and Burma, and also in tropical East Africa, where, however, it is not utilised. In Southern India, _A. suma_ is also used for the same purpose.