Lemon juice is fermented for some time to free it from mucilage, then boiled 2 Cf.
In other cases the mucilage is denser and the branches more closely compacted (Helminthora).
When it persists as a massive element of the seed its nutritive function is usually apparent, for there is accumulated within its cells reserve-food, and according to the dominant substance it is starchy, oily, or rich in cellulose, mucilage or proteid.
The mucilage must be acidulated with hydrochloric acid before dialysing, to set free the gummic acid.
The value of the city's factory products in 1905 was $13,879,159, the principal items being rubber and elastic goods ($3,635,211) and boots and shoes ($2,044,250) The manufacture of stoves, and of mucilage and paste are important industries.