36 



NEW YORK STATE MUSEUM 



poses. There seem to be planes of weakness in the stone due to a 

 slight variation of the texture. 



No thin section was cut from this sample. 



REFERENCES 



Previous investigations of refractoriness of building stones 



Buckley. Wis. Geol. and Nat. Hist. Sur. Bull. 1898. 4:73, 385. 



Mo. Bur. Geol. and Mines. Ser. 2. 1904. 2:50. 



Cutting. Weekly Underwriter. 1880. 22:257, 287, 304; 23:42. 

 Merrill, G. P. Stones for Building and Decoration. N.Y. 1903. p. 424. 

 Van Schwartz. Fire and Explosion Risks, a Handbook etc. N.Y. 1904. 



Effect of fire on stone as observed in conflagrations 

 Anon. Building News and Eng. Jour. 1904. 87:2. 

 Anon. Engineering News. 1904. 51:173. 

 Grieshaber. Engineering News. 1904. 51:173. 

 Woolson. Engineering News. 1904. 51:95,173. 



