lOiO Transactions of the American Institute. 



allows the edges of the glass to be more underneath the frame, 

 and enables the glass to expand or contract with the changes of 

 temperature, without any liability of breaking, which is often the 

 case when the edges of large plates are rigidly confined. • There is 

 a cushion of rubber or other soft material upon which, in case of 

 large panes, the glass rests. To allow for any inaccuracies which 

 there may be in the glass, where it would otherwise come in con- 

 tact with the sash, a lining of cork or other elastic material ia 

 placed in the rebate before the glass is inserted. 



To provide for the various sizes of panes of glass, and at the 

 same time form a neat miter at the corners, the greater portion of 

 the length of each side, and also the ends, is composed of a strip, 

 and a separate piece forms the corner and miter entire, and extends 

 a little distance to meet the side and end pieces, and where these 

 pieces meet, a little projection laps over the other piece, making a 

 protected joint, and at the same time covering the unsightly appear- 

 ance of the two clamps where they join, which otherwise would 

 present an open joint. 



A combined cultivator and harrow was then exhibited, which is 

 the same as that described before the Farmers' Club (see page 552). 



BIOMETRY. 

 Dr. T. S. Lambert then addressed the meeting on the measure 

 of life, for which he proposed the name Biometry, the science of 

 Jife being designated now by the word Biology. He maintained 

 that a person could not prolong his life but little beyond that of 

 the average length of his ancestors' lives, and said there were cer- 

 tain signs of longevity, such as the hazel eye and the long body, 

 wliich he had found by observation to be true. His business, that 

 of life insurance, had led him to investigate the subject in all its 

 bearings. However, the indications of longevity were not stated 

 by the speaker in such form as to admit of their being briefly 

 reported. His address was interspersed with many very appro- 

 priate and amusing anecdotes. 



MAGNETISM 

 Prof. Vanderweyde resumed the subject on which he spoke at 

 the last meeting. The principal point of novelty was the curious 

 relation which seemed to exist, with very few exceptions, between 

 the specific gravity and automic weight of those elementary sub- 

 stances which have magnetic properties. At the conclusion of 

 the remarks on magnetism, the Association adjourned. 



