From these formulae we derive two important relations, dp4 = or the function F, on the right which multiplies r, is said to be a simultaneous invariant or covariant of the system of quantics.
The spore-cell multiplies by division, while the enveloping cell is nutrient and protective.
Appears the lime tree, which multiplies rapidly and, notwithstanding the rapidity with which it is being exterminated, constitutes entire forests in the east (central Volga, Ufa).
The " black mouse " or Carson field mouse (Microtus montanus) is found throughout Nevada, as well as in Utah, north-eastern California, and eastern Oregon; it multiplies rapidly under favourable conditions, and at times causes serious injury to crops.
The mesoblast multiplies its cells, which become partly muscular and partly skeleto-trophic. Centro-dorsally now appears the embyronic shell-gland.