Answered by The Community. Making the world better, one answer at a time. Americast is porcelein on steel with a thick, sprayed on acrylic/composite backing. Unlike other enamel-on-steel tubs, these do not sound cheap & tinny when you rap on them-they sound just like cast iron.
Time Tangled Island Walkthrough. Time-Tangled Island is a really fun adventure on Poptropica. The basic idea is to travel to different periods of time and âfixâ the future by finding different objects that have been lost and then placed in the wrong time period.
The output side of the machine played the sound through a needle and an amplifier. The needle was set in the groove and the cylinder set to the beginning. The amplified vibrations played back the recorded sounds. The recording medium used in the original phonograph was awkward to use and broke easily.In 1887, Emile Berliner, a German living in America, developed a hand-cranked machine that turned a hard rubber disc on a flat plate (instead of a cylinder) which became known as the gramophone.ith his understanding of how sound waves behave, Thomas Edison developed the phonograph, the grandfather of modern record players, in 1877. The phonograph could record sound and play it back. The receiver consisted of a tin foil wrapped cylinder and a very thin membrane, called a diaphragm, attached to a needle.