HOLLOW HOUSE-WALLS.
[To THE EDITOR OF THE " SPECTATOR."1
Sin,—I occupied a new house in Montreal for about a year in the winter of 1895-96. It was newly built and comprised two stories of eight rooms, besides vestibule-hall and landings, bath- room, Sc. The total area of the house was about 12,000 cubic feet, exclusive of the basement. It was built with stone to a little above the ground-level, and then with 41 in. brickwork. The inside was fitted with about 2 in. by 2 in. upright studs2 ft. apart, the face being lathed and plastered and papered in the usual way. The air-space between was such an effective non- conductor that together with the double window-sashes the whole house was kept comfortably warns throughout the winter —never less than 60 degrees—at the cost of but three tons of anthracite coal. This quantity included the cost for cooking purposes, as well as the ]not-water supply and baths. Moreover. this benefit was more particularly appreciated in the bedrooms, as no one required more than one blanket and a light coverlet
to be comfortably warns.—I rem, Sir, Sc.. ROST. CRANE. 88 Maple Road, Penge, S.E. 20.