e of the house and the tem- fair to brisk wind to run the fan the velocity will go up to Williamson & MacTear. The furnace as it is generally constructed and as exhib- over 500 feet, and has in several cases reached over 600 feet ited at the Universal Exhibition of 1878, in Paris, consists per… … provided with his ventilators had. kept until the greatest difficulty. Mr. MacTear avoided Fie. 2.—APPARATUS FOR LIXIVIATING SODA. winter perfectly, while those in similar houses this difficulty by adding about five per cent of Washington, D. C., for 1876, the chimneys there used | without the…
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