A set of rods, made of bone or other material, each divided into nine spaces, and containing the numbers of a column of the multiplication table; a contrivance of baron napier, the inventor of logarithms, for facilitating the operations of multiplication and division.
You will also like...
Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..
If the balance of nature is left untouched, landscapes can change dramatically over time. A previous ecosystem is supers..
This tutorial describes the sigmoid curve, annual plant growth, tree growth, human growth, and insect growth as the grow..
Proteins and minerals can be derived from various dietary sources. They are essential for the proper growth and developm..
The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..