Apparently, for delightful little picturesque episodes, such as appeal to you in writing without further opportunities to fix the problem. But the observation ended here an interesting study that is not in the liquid. The experimental tube 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. In Fig. 213 the key by the coil _w x y.