Likewise, if the population consists of equal numbers of males and females, and if the females give birth to 3 children each (and the males 0), then the average birth rate of the population will be 1.5. With these basics we can now consider two simple models of population growth:
For most purposes scrolls have long been superseded by the codex book format, but they are still produced for some ceremonial or religious purposes, notably for the Jewish Torah scroll for use in synagogues.
Scroll Saw. A scroll saw is a small, stationary power saw designed to make intricate curved cuts. The saw features a small table on which the work piece is rested, similar to a band saw, but unlike a band saw, in which the blade is a rotating continuous band, a scroll saw's blade is moved up and down by a reciprocating mechanism. Smaller scroll saws may be battery powered, but most have motors that must be plugged into an electrical outlet.