770 



NEW YOKE STATE MUSEUM 



Sewer pipe are also manufactured at Albany and Troy but from 

 JSTew Jersey clays. 



Drain tile 



A clay that is capable of making good building brick will 

 Ti£ually make a good drain tile. Tbat is to say, a plastic clay 

 and one that will burn to a tough product. Unlike bricks, tile 

 may be somewhat porous in its character. It is of importance 

 ■that the clay should be thoroughly tempered before molding. 

 The latter is, in most instances, done with some form of stiff mud 

 -machine, the clay being forced out through a die of desired pat- 

 tern; the cylinder of clay as it issues from the machine is cut 

 up into desired lengths. Drying is sometimes done on pallets 

 such as are used for common brick, or it may be done under in- 

 closed sheds. The drain tile should be thoroughly dry before 

 being set in the kiln. Burning is done in ordinary scove-kilns, 

 •clamps or down-draft kilns. The smaller tile are set in the lower 

 portions of the kiln and around the sides, while the larger ones 

 are set in the center. Very often when several sizes are burned 

 at the same time they are nested, the smaller ones being set within 

 the larger. 



The dimensions of cylindric tile usually run: 



Diameter 



Length 



Weig 



ht by piece 



2 inches 



13 



inches 



3| 



pounds 



3 " 



a 





6 



a 



4 " 



a 





9 



a 



5 " 



24 





18 



i( 



6 " 



u 





24 



a 



8 " 



(( 





30 



ic 



The styles of drain tile made are as follows : 



Horseshoe tile, having cross-section shape of a horseshoe 



Sole tile, cylindrical with a flat base 



Pipe tile, plain cylinder 



Elange tile, like the preceding but with the flange at one end 



