24 



NEW YORK STATE MUSEUM 



Fire tests on marble 



Only one sample of marble was tested, Gouverneur (35). The 

 stone was little affected at the lower temperature, only in the sud- 

 denly cooled cube did any cracks appear and here they were but 

 slight and seemed to be along planes of weakness due to the differ- 

 ence in texture of parts of the stone. 



At the higher temperature the slowly cooled cube was disinteg- 

 rated to a greater extent than the fast cooled sample. The former 

 made a poor showing and had one bad crack around three sides 

 while the latter shows no cracks and the corners were but slightly 

 rounded. The greater disintegration of the slowly cooled cube is 

 due, as in the limestones, to the "setting" of the lime under the 

 action of the water. 



The flame alone cracked the sample badly and caused some small 

 pieces to be broken off from the edge. The flame and water, acting 

 together, besides cracking the cube badly broke off four large pieces 

 from the three sides which were enveloped by the flame. 



