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PROCEEDINGS OF THE AMERICAN ACADEMY 



" Table X. — Experiments with Lead and Brass. — Surfaces of 

 lead and brass nearly equal. Volume of water as before mentioned. 



" As some stopcocks may be of copper, a suite of experiments 

 was made to ascertain the effect of this union. 



" Table XI. — Experiments with Lead and Copper. — A bar of 

 lead and copper nail .three fourths of an inch long. Lead solder. 



" Table XII. — Experiments with Lead and Tin. — A half-bar of 

 each soldered without alloy. Volume of water as before mentioned. 



