“The Wealth of India” is a series continuing the tradition set by Watt’s Dictionary a century ago. It is probably the most complete and most useful treatise on plant products that has ever been written for any major country. Since the first edition (1949-1979) information has increased tremendously and therefore a second revised edition is now being prepared. Letter A was already published in 1985 and the present volume covers letter B: 350 pages of text in two columns on large pages (against 111 in the corresponding part of the original volume 1).