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 



arsenal : 



bricks at the Watertown, Mass 



No. 1 

 No, 2. 

 No, 3 

 No. 4 



Cracked at 



Pounds. 



91,000 



93,400 



119,000 



167,000 



Crushed at 



Pounds per 

 sg in. 

 29,060 

 28,530 

 20,060 

 23,500 



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

 is very little, 



Warners, Onondaga Co, The Onondaga Yitrified 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 : 



COMPOSITION. 



Calcareous 



layer in 

 shale bank 



A green 

 brick. Be- 

 ing a mix- 

 ture of the 

 different 

 shales. 



Red Shale. 



Blue Shale. 



Clay. 



Silica 



25.40 



9.46 



2,24 



22.81 



10.39 



20.96 



.95 



7.60 



54.25 

 16.89 

 5.81 

 4.34 

 6.21 

 4.30 

 2.95 

 .83 



5.01 



52.30 

 18.85 

 6.55 

 3.36 

 4.49 - 

 3.04 

 4,65 

 1.35 



5.30 

 Trace. 



57.79 

 16.15 

 5.^0 

 2,73 

 4.67 

 3.42 

 4.11 

 1.22 



4.50 

 Trace 



45.35 



Alumina 



12.19 



Peroxide of iron 



Lime 



Magnesia 



4.41 



10.99 



6.38 



Carbonic acid 



Potash 



7.24 

 3.26 



Soda 



1.14 



Water and organ mat- 

 ter 



8.90 



Oxide of manganese, . 





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. 



