TOWERS AND TANKS FOR WATER-WORKS. 



country. It had quietly passed away unnoticed and un- 

 known before the committee of the Mining Engineers had 

 met, and the best efforts of that brilliant galaxy of talent could 

 only produce a kindly eulogy." 



EFFECT OF QUENCHING ON THE PHYSICAL PROPERTIES 

 OF DIFFERENT SOFT STEELS. 



NOTB. Bars were 2 in. X I in. flats, rolled from 6 in. X 6 in. ingot, and were chilled at a 

 dull yellow heat. 



" Strictly speaking, some mention must be made of hard- 

 ening in a complete and perfect definition, for it is possible to 

 make steel in a puddling-furnace by taking out the viscous 

 mass before it has been completely decarburized ; but this 

 crude and unusual method is now a relic of the past, and may 

 be entirely neglected in practical discussion. 



" No attempt will be made here to give any iron-clad for- 

 mula, but the following statements portray the current usage in 

 our country : 



" (i) By the term ' wrought iron ' is meant the product of 

 the puddling-furnace or the sinking-fire. 



" (2) By the term 'steel' is meant the product of the cemen- 

 tation process, or the malleable compounds of iron made in 

 the crucible, the converter, or the open-hearth furnace." 



