(Encyclopedia) triangle, in music, percussion instrument consisting of a steel rod bent into a triangle, open at one angle, and struck with a steel rod. Only since the end of the 18th cent. has it…
(Encyclopedia) electroscope, device for detecting electric charge invented by Nollet in 1748. There are various types of electroscopes. The most common has a cylindrical metal case closed by two…
(Encyclopedia) AaronAaronârˈən [key], in the Bible, the brother of Moses and his spokesman in Egypt, and the first high priest of the Hebrews. He is presented as the instrument of God in performing…
(Encyclopedia) bacillusbacillusbəsĭlˈəs [key], any rod-shaped bacterium or, more particularly, a rod-shaped bacterium of the genus Bacillus. Some bacterium in the genus cause disease, for example B.…
PARTS OF THE EYE IMAGE FORMATION FROM EYES TO BRAIN CHANGING PUPIL SIZE COLOUR VISION FIND OUT MORE
Whenever we are awake, our eyes work constantly to collect information about the world.…
Windows to the SoulAnatomy and PhysiologyThe SensesWindows to the SoulCan You Hear Me Now?The Nose KnowsDon't Be So Touchy! Vision is a remarkable sense when you consider the difficulties. The…
(Encyclopedia) cam, mechanical device for converting a rotating motion into a reciprocating, or back-and-forth, motion, or for changing a simple motion into a complex one. A simple form of cam is a…
(Encyclopedia) rivet, headed metal pin or bolt whose shaft is passed through holes in two or more pieces of metal, wood, plastic, or other material in order to unite them by forming the plain end…
