To renovate a glass in one corner of which the silvering has assumed a frosted appearance, or has bscome spotted by damp, proceed in this manner. Cut ou1 the aftected silvering, first marking it oft squarely with a straightedge and chisel; lay the glass fiat on its face and apply either of the silvering solutions given on p. 103. Mix equal parts of (a) and (b), and pour upon the clear glass, allowing the solution to flow evenly over the bare place. Distilled water should be used, and i be solutions should be kept in black bottles.