AN INTRICATE COLONY OF OPEN-SEA ANIMALS (Physophora Hydrostatica) RELATED TO THE PORTUGUESE MAN-OF-WAR
There is great division of labor in the colony. At the top are floating and swimming “persons”; the long ones below are offensive “persons” bearing batteries of stinging cells; in the middle zone there are nutritive, reproductive, and other “persons.” The color of the colony is a fine translucent blue. Swimmers and bathers are often badly stung by this strange animal and its relatives.
An atom of matter is composed of electrons. We picture an atom as a sort of miniature solar system, the electrons (particles of negative electricity) rotating round a central nucleus of positive electricity. In the above pictorial representation of an atom the whirling electrons are indicated in the outer ring.
From the book: The Outline of Science, Vol. 1, J. Arthur Thomson (1861 - 1933)