The starches have been classified by Dr. Muter, according to the appearance they give under the microscope, into five groups:

Class I

Hilum and concentric rings visible. All the granules, oval or ovate. Tous-le-mois, potato, arrowroot, etc.

Class II

The concentric rings are all but invisible, the hilum is stellate. Maize, pea, bean, etc.

Class III

The concentric rings are all but invisible, also the hilum in the majority of granules. Wheat, barley, rye, chestnut, etc.

Class IV

All the granules truncated at one end. Sago, tapioca, etc.

Class V

All the granules angular in form. Rice, tacca, arrowroot, oats, etc.

The principal starches used for finishing cotton fabrics are potato (farina), wheat, Indian corn (maize), rice, tapioca, arrowroot, sago; the last three not so often as those previously named.

POTATO STARCH.

ARROWROOT STARCH.

WHEAT STARCH

RICE STARCH

SAGO STARCH

INDIAN CORN STARCH

TAPIOCA STARCH