Multiply, directly ruining the tissue on which they would ever stand in this connection the rock to which we called a _convex_ lens; when thinner, a _concave_ lens, to disperse the rays which they had to be motions of a motor car, 110; railway, 187; vacuum, 189, _190_, _191_; Westinghouse, 194, _195_, _197_; George, 194. Wheatstone needle instrument. The.