INDIGO n.
fferent genera and orders; as, the woad, Isatis tinctoria, Indigofera tinctoria, I. Anil, Nereum tinctorium, etc. It is a dark blue earthy substance, tasteless and odorless, with a copper-violet luster when rubbed. Indigo does not exist in the plants as such, but is obtained by decomposition of the glycoside indican.…
POTATO n.
tato vine. The black species (Lytta atrata), the striped (L. vittata), and the gray (L. cinerea, or Fabricii) are the most common. See Blister beetle, under Blister. -- Potato rot, a disease of the tubers of the potato, supposed to be caused by a kind of mold (Peronospora infestans), which is first seen upon the leave…
ROTARY a.
ary shears, shears, as for cloth, metal, etc., in which revolving sharp-edged or sharp-cornered wheels do the cutting. -- Rotary valve, a valve acting by continuous or partial rotation, as in the four-way cock.
SALLOW n.
cies of willow, especially those which do not have flexible shoots, as Salix caprea, S. cinerea, etc. Sallow thorn (Bot.), a European thorny shrub (Hippophae rhamnoides) much like an Elæagnus. The yellow berries are sometimes used for making jelly, and the plant affords a yellow dye.