102 NEW YOEK STATE MUSEUM 



H. E,. Rose's brick yard is also situated in this town and about 

 3 miles east of tlis Hudson river. Tlie clay deposit, wbicli has 

 an extent of 60 acres, is yellow in color and 8 feet thick. A blue 

 clay is said to underlie the yellow. The bricks are molded in soft 

 mud machines operated by horse power. 



Barrytown, Dutchess co. There are deposits of clay along the 

 river at this locality but they are not being worked. The following 

 is an analysis of them. 



Silica 59.81 



Peroxid of iron and alumina 22 . 00 



Lime 4.35 



Magnesia 2.29 



Moisture .37 



Combined water and organic matter 7 . 89 



Alkalis, not determined . . . \ . 



96.71 



CatsMll, Greene co. Alexander McLean's yard is situated on 

 Water st., east of the wagon bridge. He has 12 acres of clay 

 land. The clay is mostly blue with yellow and red on top, and 

 is about 90 feet thick. 



A partial analysis of the blue clay is as follows : 



Silica 50 . 60 



Alumina 21 . 00 



Peroxid of iron 7.35 



Lime 3.75 



Magnesia .96 



The upper portion of the clay bank is a tough material and has 

 to be worked with a pick. A gray black sand of the same struc- 

 ture and appearance as that at Coeymans underlies the clay. At 

 this locality, however, it contains too much lime to use it for tem- 

 pering. Mr McLean has to bring his tempering sand from Jones- 



