Marbles. 37 



of buildings, but nothing has been done there for a long time. The 

 •stone is impure and somewhat crumbly on surface ledges, and is not 

 a good marble. 



At Morrisania some stone has been quarried for bridge construc- 

 tion ; also at Mott Haven, both in the white or yellow- white crystal- 

 line limestone, but they cannot be called marbles in a proper sense. 



At Tremont (Westchester County), St. John's College owns 

 a marble quarry on Third avenue. The dip of the strata is 66° 

 to 70° S., 60° E. One prominent joint system runs N. 20° W. and 

 dips 80° S. 70° W. A second system dips a few degrees north- 

 west. The stone is a white, crystalline marble, and was used in 

 trimmings for St. John's College. Its contrast in color with the 

 dark-blue gneiss in the college buildings is striking and effective. 

 This quarry is worked for the college work, and not for the public 

 market. 



A white marble was formerly quarried on the east side of Wash- 

 ington avenue, and near One Hundred and Seventy-eighth street and 

 Tremont. The strata here dips 80° S., 55° E. The opening is only 

 about 100 feet long, 50 feet wide and 15 feet deep. 



The quarry of Caleb Hillman is on the south side of East One 

 Hundred and Seventy-eighth street, between Third and Madison 

 avenues. The rock has been opened for a length of 200 feet on the 

 strike of the beds and about 60 feet in width. The dip here is 

 80° S., 57° E. The opening is not over 10 feet deep. The 

 stone obtained is white and fine-crystalline. Some of the bed 

 faces show a little yellowish mica, and in some parts of the beds a 

 white tremolite is observed. The quarry was opened thirty years 

 ago. 



North of this quarry of Hillman's a few rods is another and older 

 opening which is 200 feet long b} r about 15 feet in depth, running 

 from One Hundred and Seventy-ninth street southward. This 

 latter quarry is not now worked. Hillman sells marble for steps, 

 lintels, etc., and for house trimmings. There is no water and no 

 machinery is used. 



These marble quarries in Tremont are worked irregularly as the 

 demand calls for the stone, and the output in the aggregate is com- 

 paratively small and unimportant. 



Tuckahoe, Westchester County. — The marble quarries at Tucka- 

 hoe are opened in a depression or narrow valley at the eastern foot 



