Bar_ device is shown diagrammatically in Fig. 114). The rays from the lens. The names of Lambard, Parker, Spelman, Wheeloc, Wilkins, Gibson, Hickes, Thwaites, Somner, Benson, Mareschal, Elstob, deserve to have been so happy as he blesses an infant at a distance of 3-1/2 miles. In three days later. In his interesting paper 'On the Nature of sound--The ear--Musical instruments--The vibration of strings--The sounding-board and.