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TRANSACTIONS OF THE 



the incrustations formed in one of the steam boilers used in the 

 Crystal Palace, into which one barrel of the compound solvent 

 was introduced, and continued therein for about five weeks — 



Respectfully report, that the water having been let out of the 

 boiler, they examined the interior thereof, and found the same 

 perfectly clean ; the incrustation which was quite thick had 

 been entirely dissolved and removed by the compound solvent. 

 And they consider this a very valuable invention, and entitled to 

 the highest consideration by all using steam boilers. They there- 

 fore recommend the same to the favorable consideration of the 

 Institute. [-^ silver medal awarded. 



Platform Light. 



