HOM Activities - Habits of Mind

The telephone dates back to 1667, when English physicist Robert Hooke made a string telephone that carried sounds over a wire pulled tight. Around 1850, Sir Charles Wheatstone of England invented the acoustical phone. A musical box transmitted sounds from the cellar of a house to the second story of the same house using a wooden rod. ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download