CLAY WORKING INDUSTRIES. 



95 



Tne clays represented in the first table are as follows: 



No. 1. Brumage's Stoneware Clay, Roseville, Ohio. 



No. 2. Allen's 



No. 3. Walker's Clay, used for cooking wares, Roseville, Ohio. 



No. 4. Zanesville Stoneware Co., clay ground in tracing mill for 

 hand turning. 



No. 5. Zanesville Stoneware Co., same clay washed and pressed for 

 use in jollies. 



No. 6. Bagley & Roberts, Zanesville, clay for cooking wares. 



No. 7. Uniontown Stoneware Clay. 



No. 8. Akron Stoneware Clay. Average of several samples selected 

 from the ground clay used in several plants, and mixed. 



No. 9. New Brighton, Pa. Stoneware clay, from the factory which 

 is supposed to produce the finest American stoneware. 



No. 10. Salineville, O. Stoneware clay deficient in fire qualities. 



TABLE I. 



The analyses of this table comprise a fairly full representation of the clays of 

 the Zanesville district, but only give one analysis of the more important Akron 

 district. This one analysis is one of uncommon value, however, as it represents in 

 itself an average. 



The analyses referred to before as incomplete or unsatisfactory, are given below: 





1 



2 



3 



4 



Silica 



72.10 



19.38 

 2.27 

 6.25 



68.24 



22.61 



2.59 



6.56 



69.05 



21.37 



2.58 



7.00 



72.26 



Alumina® 



19.23 



Water 



.96 

 7.55 









1C0.00 



100.00 



100.00 



100.00 



*By calculation. 



1-2-3. Old analyses of the Akron stoneware clay from the Springfield clay pits. 

 4. Greentown stoneware clay. 



A careful study of these figures, even the incomplete ones, shows a 

 substantial uniformity in the character of clays used for this branch of 

 pottery manufacture. The following facts are deduced from the table, 

 which may prove of value to anyone wishing to investigate a clay as to 

 its fitness for this business : 



1st. The average of ten accurate and skillfully made analyses of 

 clays now in use shows : 



Clay base 56.65 



Sandy matter 37.45 



Fluxing matter 4.44 



Moisture 1.57 



100.14 

 Total silica 65.09 



