AMERICAN INSTITUTE. 607 



iron is best adapted for tlie architecture of the present day. when glass 

 can be employed to any extent, and the opening of buildings can be made 

 large, giving the vivifying influence of light and air within buildings. 



After some desultory remarks upon the expansion of metals, wood-work, 

 etc., in which the compensation pendulum, wooden pendulum, steel rods, 

 etc., were canvassed by Dr. Vanderweyde and Messrs. Howe, Seeley, 

 Johnson and Garvey, Mr. Haskell obtained the floor and explained the 

 nature of India rubber paint, its mode of application, and the excellent 

 qualities it possesses for protecting iron buildings and tin roofs. The form 

 of roofing material which he exhibited was admirable, and the paint was 

 regarded by all present as an excellent article. 



The subject selected for the next evening was " Expansion by Heat." 



