CLAYS OF NEW YOKE 819 



This clay is used chiefly for the manufacture of stoneware, being 

 shipped to various cities in Connecticut and ISTew York states. It 

 is also used by Perkins & Pit of Stamford, Ct., for the manu- 

 facture of stove linings. In the latter case about 15fo of it is mixed 

 with N^ew Jersey clay. Under an ordinary fire this clay burns to a 

 light color, but with a hard fire it is said to blacken. The fire sand 

 found associated with this clay bears a most excellent reputation as 

 regards its refractory qualities. 



Owing to litigation the clay deposit of Carpenter Bros, has been 

 inactive for several years, but work on it will be resumed again this 

 summer. An analysis of the material is given in the table of 

 analyses below. 



In the spring of 1898 a new deposit was opened on the north 

 shore of Mosquito inlet almost directly opposite Carpenter's pit. 

 It is said that this deposit is fully 30 feet deep. It is on the property 

 of Mrs Helen McKenzie. A sample of this clay was collected for 

 physical examination. It is sandy and grayish, quite different in 

 appearance from that found in Carpenter's pit. W];Len mixed with 

 32 . 40;^ of water it gave a very plastic mass, but owing to the large 

 amount of organic matter which it contained it was impossible to 

 form briquettes not free from flaws, so that the tensile strength was 

 only 42 pounds a square inch as a minimum, with 50 pounds maxi- 

 mum, which is undoubtedly low. 



The air shrinkage of the bricklets was 8^. At 2200 degrees 

 F. the total shrinkage was ISfo, and the clay had become thoroughly 

 dense. Viscosity occurred at cone 27 in the Deville furnace. 

 The color when burned to vitrification is buff, but at viscosity the 

 clay burns reddish. The mechanical analysis of the clay showed: 



Clay substance 85 



Silt 3 



Very fine sand 3 



Pine sand 6 



97 



Balance mostly organic matter 



