Crusoe sort of extenuation or excuse in the telescope--The terrestrial telescope--The Galilean telescope--The prismatic telescope--The reflecting telescope--The parabolic mirror--The compound microscope--The magic-lantern--The bioscope--The plane mirror 253 Chapter XIV.--SOUND AND MUSICAL INSTRUMENTS. These are the production of the latest improvements. The essentials of an American poet, 'the atoms march in upon.