M w TORI BTA1 I mi 8ETJM 



rt distant rt of the Hudson river, crossing 



I; • aear South Rondout) wero found to be remark* 



ably ] e from magnesia and well adapted to their 



pm Ai ;i d, mosl of tbo clay deposits near the 



Hudson r tried too much Band to be of use. After careful 



[table clayi found away from the river, the best 



found in an extensive deposit near Phoenicia, on the Ulster 

 and 1 N railroad. 



L88< Wallkill Portland cement co. was organized. The 



limestone and clay properties above referred to were purchased, 

 ; an abandoned flour mill at Carthage Landing on the Hudson 

 1 and equipped with suitable machinery, a drying chan- 

 nel and two upright kilns. The manufacture of Portland cement 

 - commenced at these works early in 1881. The product, 

 though small in quantity, was of excellent quality and had a 

 ready sale. Tests and reports by Messrs Clark and Maclay 

 demonstrated the value of the cement, and the experimenters 

 were Batisfied that the manufacture could be made a commercial 

 success on a larger scale. At both the Low Point and Carthage 

 Landing plants gashouse coke was used for fuel. 



analyses of the clay and limestone used are given 

 later in this paper, in discussing the operations at South Ron- 

 dout. A typical analysis of the cement made at Carthage Land- 

 folloi 



Lime 59.43 



Magnesia 1.72 



Peroxid iron 5.17 



Alumina 8.13 



( !arbonic acid 



Silica 24.1 



Water, alkalis, etc 1.45 



100 



