m.w roi musi I'm 



bardn< b Limestone may affect its com- 



tlue in [f too hard, the cost of quarrying 



it 1 • . and it will be more difficult to burn, whereas, 



ad to break up or pulverize in burning and con- 

 g up the kiln. If we musl use a Bilicioufl limestone, 

 one in which the Bilica ia evenly distributed. 



[JSES OF QMESTO] 



■ -1 in the industrial arta to a large extent in 



fit! ■ burned condition, and in the following pages an 



a made to describe 1) the uses of common and 



dan limestone 2) the usee of lime, and 3) argillaceous 



lin r cement rock. 



Paper-making 



Much paper ia now made from wood pulp, that known as sul- 

 fite pulp being a superior grade, in whose production consider- 

 able quantities of both dolomite and limestone are used. The 

 following description of its use has been kindly furnished to me 

 I'. A. Howard, of the Vermont marble co. 

 The broken Btone is thrown into cylinders, 8 feet in diameter 

 and 20 to L60 feet high. When the tubes are full, fumes of 

 furic acid are led into the bottom, and water allowed to trickle 

 ml tie- top. Tli' e thus becomes slowly dissolved, 



I the liquor i- drawn off into Btorage tanks. This solution is 

 the wood. The latter is cut into chips one 

 <-r two inches Long, and put in a u digester " holding seven or eight 

 wood. The liquor ia also introduced, and the mixture 

 I by Bteam is under pressure (>>v Beveral hours. The sulfite 

 lime or magnesia removea all the pitch and everything except 

 ►dy fibers, and at the same time removea all discoloration. 



Qufacturerg Bay that the liquor can be made faster 

 an: the use "f dolomite, in order to get which they 



