200 



NEW YORK STATE MUSEUM 



tion to paving, a square tile, for linings, seven by seven inches and 

 two inches thick is being manufactured. These, it is claimed, 

 were placed for seven weeks in the acid vats at the Solvay works 

 and were unaffected. The following tests were made on these 

 bricks at the Watertown, Mass., arsenal : 





Crscked at 



Crushed at 



No. 1 



Pounds. 

 91,000 

 93,400 

 119,000 

 167,000 



Pounds per 

 sg. in. 

 29,060 

 28,530 

 20,060 

 23,500 



No. 2. . . 



No. 3 



No. 4 





The bricks are said to absorb on 1.49 per cent, moisture, which 

 is very little. 



Warners, Onondaga Co. The Onondaga Vitrified Pressed 

 Brick Co This yard uses both shale and clay. The works are 

 situated about half a mile east of Warners along the West Shore 

 track. 



Analyses of the shale have been made and are given below : 









A green 

















Calcareous 



brick. 



Be- 















COMPOSITION. 



layer in 

 shale bank 



ing a mix- 

 ture of the 



Red Shale. 



Blue Shale. 



Clay 











different 

 shales. 

















25 



40 



54 



25 



52 



30 



57 



79 



45. 



35 





9 



46 



16 



89 



18 



85 



16 



15 



12. 



19 





2 



24 



5 



81 



6 



55 



5 



20 



4. 



41 





22 



81 



4 



34 



3 



36 



2 



73 



10. 



99 





10 



39 



5 



21 



4 



49 



4 



67 



6. 



38 





20 



96 



4 



.30 



3 



04 



3 



42 



7. 



24 



Potash 





95 



2 



.95 



4 



65 



4 



11 



3. 



26 



Soda 









.83 



1 



.35 



1 



22 



1. 



14 



Water and organ mat- 











7 



.60 



5 



.01 



5 



.30 



4 



50 



8. 



90 



Oxide of manganese. . 











Traee. 



Traoe 





















Total 



99 



.81 



99 



.59 



99 



.88 



99 



79 



99. 



86 



Analyst, Dr H. Froehling, Richmond, Va. 

 The samples were all dried at 212° F. 



