216 



GEOLOGY OF OHIO 



Sewer Pipe plants Running on Paving Brick. 



31 

 32 

 33 

 34 

 35 



Nelsonville Sewer Pipe Co 



East Clayton Mfg. Co 



Hay den vi lie Mining & Mfg. Co 



Hocking Clay Co 



The A. O. Jones & Co 



Total . 



Nelsonville.., 



Lick Run 



Haydenville 



Logan 



Zanesville ... 



Fire Clay... 



2 



" 



1 



" 



1 



C( 



1 



<< 



1 



41 





20 

 12 

 14 

 14 

 10 



529 



* One-half fire clay and one-half shale. 



The manufacture of building blocks has been alluded to before as 

 being a very promising business, and one which is sure to grow; it offers 

 two special features for consideration. The first point is, that the use of 

 Auger machines is possible and indeed profitable, the building blocks 

 being plain sections of a square hollow bar; the production of such a 

 bar is more economical by Auger mill than by the vertical steam press. 

 The Double Ended Horizontal Steam Press is specially adapted to this 

 class of work and enables the simultaneous production of two differ- 

 ent kinds of ware. 



The second point is the introduction of the car and tunnel 

 system of drying; the ware having comparatively little variation 

 in size and like fireproofing, electrical subway conduits, building 

 blocks, etc. enables the dryers to furnish a steady supply of one kind of 

 ware to the kiln setters. In the regular sewer pipe process the drying 

 floors not only serve as means of drying the pipe, but as storage rooms 

 from which the various kinds of ware needed in setting the kilns most 

 economically can be drawn as needed. On this account the drying 

 system for sewer pipe is not likely to undergo material change from 

 existing plan. 



But in bu'lding blocks this is a great step in advance, as it reduces 

 the cost of the plant so much that the business is likely to be pushed by 

 many men who could not otherwise touch it. 



The first tunnel and car dryer for hollow wares originated with Mr. 

 H. B. Camp of Cuyahoga Falls; he worked this plan successfully for 

 nearly ten years before any one else saw fit to try it; it is now in use in 

 six or eight plants. The present experience indicates that drying hollow 

 wares of small and medium size is not only possible, but profitable in a 

 chamber dryer, and that by rigidly watching the conditions of the air, 

 larger wares still could be profitably handled in this way. The use of 

 progressive dryers has not been ' attempted in this connection and it is 

 not likely that it will be. 



The manufacture of drain tiles for agricultural purposes is to the 

 art of pipe making, what common brick making is to the paving brick 

 business. 



It not being either desirable or advantageous to have the product 

 vitrified, the clays used can be of a very low grade. The bulk of the 

 material used is red plastic clay from the drift, or sedimentary clays 



