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Arrow-root, and tout-les-mois, is the fecula obtained by a similar process from those several roots, the nutritious qualities of which are too well known in the sick chamber to call for further mention.

In case the sauce should not be thick enough, add a little fecula, stir, and leave awhile longer on the fire, and it is ready for use.

Such substances as cellulose, fecula, albumin, fibrin, and the like, never fail to have this power.

It is a grey, thick substance which curdles like flour paste, whose chief ingredient is fecula.

In order to obtain the fecula free from impurity, pure water must be used, and great care and attention paid in every step of the process.