In a paper read before the Civil and Mechanical Engineers' Society by Mr R. M. Bancroft on the renewal of King's-Cross station roof, it was stated the glazing putty used in this roof was that known by the above name, and manufactured by Sir W. A. Rose & Co., Upper Thames Street. It is peculiarly adapted for fixing the glass in roofs of railway stations, greenhouses, and other buildings where plate-glass and iron sash-bars are used. This putty hardens in a few hours after being used, but will, when exposed to solar heat sufficient to cause expansion of the glass and metal, become plastic, and on cooling again returns to its original firmness, thus preventing the loss by fractures and leakage which occurs so frequently in places where the ordinary glazier's putty is employed.