GEORGE FREDERICK BARKER. xxix 



1899. The Hydrogen Vacua of Dewar. Read before the National Academy 

 of Sciences. Rept. Nat. Acad. Sci. for 1899, p. 13. 



1899. Air as a Liquid. X. Y. Independent, May 25, pp. 1419-1422. 



1901. Memoir of Frederick Augustus Genth. Read before the American 

 Philosophical Society. December 6, 1901. Proc. A»i. Phil. Soc, 40 

 (Obituary Notices), X-XXIL 



1901. The Monatomic Gases. Read before the National Academy, Novem- 

 ber, 1901. Rept. Nat. Acad. Sci. for 1901, p. 16. 



190 1. On the Newer Forms of Incandescent Electric Lamps. Read before 



the National Academy. November, 1901. Rept. Nat. Acad. Sci. for 

 1901, p. 16. 



1902. Biographical Memoir of Frederick Augustus Genth, 1820-1893. Read 



before the National Academy of Sciences, November 12, 1901. 

 Biographical ^lemoirs Nat. Acad. Sci., Vol. 5, 202-231. 



1903. Radioactivity and Chemistry. An address delivered before the Chem- 



ical Society of Columbia University, March 19, 1903. School of 

 Mines Quarterly, 24, 267-302. 

 1903. On the Radioactivity of Thorium Minerals. Read before the Na- 

 tional Academy of Sciences, April, 1903. Am. J. Sci., 16, (4), 161- 

 168. 



1903. Intratomic Energy; the L'nmeasurable Force of Inanimate Nature. 



A^. Y. Sun, p. 6, July 12. 



1904. On Radioactivity and Autoluminescence. Read before the National 



Academy of Sciences, April, 1904. Rept. Nat. Acad. Sci. for 1904, 

 P- 13- 



1905. Biographical Memoir of Matthew Carey Lea, 1823-1897. Read before 



the National Academy of Sciences, April, 1903. Biographical Mem- 

 oirs Nat. Acad. Sci., Vol. 5. 154-208. 



