22 FEBRUARY 1868, Page 22

On the Ventilation of Dwelling-Houses and the Utilization of Waste

Heat from Open Fireplaces. By Frederick Edwards, jun. (Hardwicke.) —The questions started by Mr. Edwards are moat important to all householders, and the second half of the title demands especial notice. Perhaps the first part of the book is more particularly addressed to those who have the charge of public buildings, but the whole work has its points of general interest and utility. One suggestion is that the Eng- lish houses should follow the example of the German houses in adopt- ing double windows, as greatly increasing the warmth of rooms, and excluding draughts of cold air. Other suggestions relate to chimneys, smoke flues, gas pipes, &c.; and full accounts are given of many devices for warming, purifying, admitting, and removing air, most of which are made clear by illustrations.