794 



of steam by the safety-valve, it will be prudent to put a 

 small reservoir of water near the boiler, and connected 

 with it, so that one can readily examine it, and fill it as 

 often as it shall prove necessary. 



loth. The stove should be made of thin sheets of 

 brass, and well soldered or brazed throughout in order 

 to prevent the steam from forcing its way into the 

 room ; but great care must be taken not to leave the 

 stove its metallic lustre on the outside. On the con- 

 trary, it must be painted on the outside, in order that it 

 may diffuse more heat into the apartment It is pos- 

 sible to give it the appearance of a marble or granite 

 column, or to paint it in any other way which corre- 

 sponds best on the outside with the furniture of the 

 room. For the hall of the Institute I should propose 

 to take away three of the wooden columns which are 

 now there, and which do not support any thing, and to 

 replace them by three copper columns of the same 

 shape and size, and painted on the outside of the same 

 colour. These three copper columns will be three steam 

 stoves connected with a single boiler, which may be 

 put in a little room on the ground floor, which happens 

 to have a chimney, and which is used at present as a 

 sort of lumber-room where articles of small value are 

 stored. 



In this way the hall of the Institute will be neither 

 encumbered nor disfigured by the apparatus used for 

 heating it in winter ; and, being provided with double 

 windows of ground glass, it will be lighter and more 

 cheerful, and at the same time more quiet, being shut 

 off from the cheerless and disagreeable objects which 

 surround it on every side. 



I shall say nothing of the advantage which would be 



