M.—Madder, [38], [98-105], [132].

Magenta, [44].

Maize, [132].

Mercerised Cotton. Cotton prepared by treating with a solution of caustic potash or soda or certain other chemicals. Discovered by John Mercer in 1844.

Milling. The operation of fulling cloth.

Mordants, [24]; general remarks on, [34]; primitive mordants, [25].

Muriate of Tin, [31].

Myrobalans, [26], [35], [36]. The fruit of several species of trees, growing in China & the East Indies, containing tannic acid, (25-40% tannin).

O.—Oak bark, [128].

Oak galls, [35], [36].