GEOLOGICAL WRITINGS OF ALBERT E. EOOTE. 485 



tucky ; Cincinnati, Ohio ; Paris, 1889, and at the Colonial Exposition of 

 1880, at which time he delivered a course of lectures on minerals and 

 gems before the Workingmen's Association with considerable success. 



Perhaps, however, his most important work, from a scientific stand- 

 point, was in connection with the occurrence of diamonds, or at least of 

 diamond-carbon, in meteorites. This was in 1891, when he visited the 

 region of Canyon Diablo, Arizona, and brought thence several large 

 meteorites and many small pieces of the iron meteorite that has since 

 become so celebrated. The extreme hardness developed in portions of 

 one of the masses in the process of cutting led to special investigation 

 by Dr George A. Koenig, and the result was that small quantities of 

 diamond-carbon were found in cavities in the iron. These facts were 

 announced by Dr Foote at the Washington meeting of the American 

 Association for the Advancement of Science in the same year, 1891. Two 

 years later, at the World's Fair at Chicago, the powder from one of these 

 cavities was successfully tested under my own direction by being used 

 in actually polishing a diamond, and its character established beyond 

 any possible doubt. 



He has done a special work for mineralogy in this country which en- 

 titles his name to honor and regard. The great business that he has built 

 up and administered is, we understand, to be carried on by his son, and, 

 for the sake of science, we trust may be equally successful. 



BIBLIOGRAPHY 



Modification of the vacuum or filter-pump : Ainer. Assoc. Adv. Science, 1873, pp. 



141-143. 

 Modification of the Jagn vacuum filter-pump: Amer. Jour. Sci., vol. iii, 1873, pp. 



360-363. 

 Zonochlorite, a new hydrous silicate from Neepigon bay : Amer. Assoc. Adv. Science, 



1873, p. 63. 

 Twin crystals of zircon from Eganville, Canada: Proc. Philadelphia Acad. Sciences, 



1882, p. 50. 

 Stalactites of Luray cave, Virginia : Ihid., p. 48. 

 A new mineral from Canada : Ihid., p. 58. 

 Sphene, etcetera, from Renfrew county, Canada: Ibid., p. 49. 

 Gems and ornamental stones of the United States : Nature, Nov. 17, 1887. 

 Opal mines, Queretaro, Mexico : Proc. Philadelphia Acad. Sciences, 1886, pp. 278-280. 

 A new locality for meteoric iron, with a preliminary notice of discovery of diamonds 



in the iron : Amer. Assoc. Adv. Science, 1891, pp. 279-283. 

 A new meteoric iron from Garrett county, Maryland: Amer. Jour. Sci., vol. iii, 



1892, p. 64. 



Preliminary notice of a stone seen to fall at Bath, South Dakota: Ihid., vol. iii, 



1893, p. 64. 



LVIII— Bull. Geol. Soc. Am., Vol. 7, 1895. 



