THE MANUFACTURE OF PAPER 



obtained a solid block, containing from one hundred 

 and twenty to one hundred and sixty thicknesses or 

 sheets of the original paper. The thickness is only 

 from four and one-half to five and one-half inches, and 

 in weight, density, and solidity the block resembles 

 more the finest-grained, heaviest metal than it does 

 the original paper product. It may be called car- wheel 

 paper. To complete the wheel there are required a 

 steel tire, a cast-iron hub, wrought-iron plates to pro- 

 tect the paper on either side, and two circles of bolts, 

 one set passing through the flange of the tire, the other 

 through the flange of the hub, and both sets through the 

 paper. The paper blocks are turned on a lathe, which 

 also reams out the center-hole for the hub; two coats 

 of paint are applied to keep out moisture ; the cast iron 

 is pressed through by hydraulic pressure; the other 

 parts are forced into place, and the paper center is 

 forced into the steel tire by like hydraulic power; and 

 there, a product of human ingenuity, is a paper car 

 wheel, which never is injured by vibrations, and is safer 

 and longer-lived, though costing more, than any other 

 car wheel made." 



But the wheels of cars are not t the only part of the 

 car that is sometimes made of paper. The boards for 

 interior finishings, and sometimes the seats, are made 

 from what is known as "paper lumber." This paper 

 lumber is made by passing ordinary straw-board through 

 a vat of resin and other waterproofing at a temperature 

 of about 350 F., then placing a number of these sheets 

 together and subjecting them to hydraulic pressure. 

 Boards so made are usually about a quarter of an inch 



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