Heating Btiild'wgs hj Steam, 1 57 



throughout the mass. The iron should be so placed as to 

 have a firm bearing every w here, except where the saw is to 

 pass, to prevetit any part from being torn off by the saw; 

 and the iron should be cut briskly, using the whole k'na;th 

 oF ihe saw, the teeth of which should be set fine. By this 

 simple method not only plates but mill gudgeons, and evea 

 anvils, have been cut uith great facility. When the piece 

 to be cut is large, two saws should be employed, for the 

 convenience oF using and cooling them ahernatelv : the 

 saws receive little or no injury. This useful process, though 

 not generally known, is not new: several years ago M. Pic- 

 tet observed a workman saw a hot casi-ircn pipe in the 

 workshop of Mr. Paul of Geneva. 



On Saturday the 20th of February this useful process was 

 tried in the presence of several gentlemen at the iron foun- 

 dry of Mr. Williams, in Waterford, and the success of the 

 experiment was complete. The operation was repeated se- 

 veral times, and always with facility. 'I'hc iron, as stated 

 above, should be heated to a cherry red, and the saw need 

 only be selected accordinsi to the fineness of the pieces into 

 which the metal is to be cut. The operation is perfectly 

 easy, and the saw remains iminjured. 



HE.\TING BUILDINGS BY STEAM. 



This beneficial practice is every day coming into more 

 general use. Not only are large manufactories, as cotton- 

 mills, now rendered comfortably warm in this manner, but 

 churches and less extensive buildings. Some lime ago a 

 plan was presented by Mr. Robertson Buchannan, civil 

 engineer, to the magistrates of Aberdeen, for heating one 

 of the churches in that city, (a Gothic building we believe,) 

 which has since been executed, and gives perfect satisfac- 

 tion. The fuel is put to the boiler on Saturday evening, 

 and is continued till the congregation meets for the after- 

 noon service on Sunday, At the end of January the steaiij 

 lieat brought ihe temperature of the place to 46" or 48'^, 

 which wag increased by the presence of the congregation 

 about 4° or C higher. The printing-office of the Glasgow 

 Chronicle has for some lime been comfortably and cecono- 

 niically healed by Mr. Buchannan's arraugemcat of steam 

 tubes. 



A recent number of the Gazette dc Same contains tht 

 following account of a remarkable recovery from the efllcts 

 of poisonous mushrooms. A boy ten years of age, having 

 intauiiouBly eaten some mushrooms which he had picked 



