The Principles of Leather Manufacture

by H. R. Procter

Grevillia striata. Australia. Bark contains 18 per cent. tannin.

Leucospermum conocarpum. Kruppelboom. Knotted Tree. Cape of Good Hope. Said by de Lof to contain 22 per cent. of tannin; but a specimen examined by the Author yielded 10·9 per cent. on analysis.

Protea mellifera. Sugarbush. Suikerbosch. Cape of Good Hope. Contains 25 per cent. tannin, according to de Lof; but Palmer found 18·8 per cent.

Protea grandiflora. Waagenboom. Cape. Contains 25 per cent. tannin (de Lof); 15·9 per cent. (Palmer); 15·6 per cent. (Procter).

Protea speciosa. Cape of Good Hope.

Leucadendron argenteum, Silver Tree, Silverboom, Witteboom Cape of Good Hope. Bark said to contain 16 per cent. tannin (de Lof); a specimen examined by the Author yielded 9·2 per cent.

Brabium stellatifolium, Wilde Amandelboom, Wild Almond.

PLUMBAGINÆ.

Plumbago Europea, Leadwort. Fr. Dentelaire. A garden plant in England, native in France; contains much tannin, especially in the root-bark.

Statice coriaria, Marsh Rosemary. South of Russia. Roots up to 3 metres long and 2-12 cm. thick; used by Kalmucks for tanning sheep-skins; contain 22 per cent. of tannin (de Lof).