REPORT OF THE POLYTECHNIC ASSOCIATION. 37 



cover large surfaces of wrought iron with a film of Franklinite 

 metal of any desired thickness, which coating will be extremely 

 hard and little liable to rust, and that as a cement or solder for 

 wrought or cast iron, this new material will prove to be of great 

 utility. The committee recommend that a gold medal be award- 

 ed to Mr, Selleck. 



Baudellot's Beer Cooler. 



This beer cooler consists essentially of an upright frame or 

 series of horizontal copper pipes, so joined at alternate ends 

 as to form a continuous water channel. In operation a stream of 

 cold water flows within the pipes from the bottom to the top, 

 where it is discharged, while the hot wort is laid on the whole 

 length of the upper pipe of the series, and flows down evenly 

 over the outside of the remaining pipes to the bottom, whence 

 it is led to the fermenting tuns. The rapidity of flow and tem- 

 perature of the cold water is easily adjusted to the amount of 

 work to be done ; also it is to be observed, that while the wort 

 is properly and uniformly cooled by reason of the large surface 

 in contact with the air, it becomes thoroughly aerated. 



A special committee (Messrs. Johnson, Dibben and Seely) wit- 

 nessed the cooler in operation, with approbation, at some of the 

 largest breweries in the city. 



A large silver medal is recommended to be awarded to the 

 proprietors. 



The other articles exhibited to the Association, and examined 

 by the section, are not found worthy of the distinction of premi- 

 ums. Some of them, however, display commendable ingenuity, 

 and a fair degree of novelty. The lack of advantage over inven- 

 tions of similar design alone excludes them from more favorable 

 notice. 



The lamps designed to burn coal oil, without a chimney, were 

 specially examined by Mr. Churchill, whose report is hereto 

 annexed. 



The polar refrigerator was dismissed from examination on the 

 ground that it had been previously exhibited at a fair of the 

 Institute, 



Respectfully submitted. 



CHAS. A. SEELY, Sec'y. 

 New York, February 21 th, 1862. 



