Note 636 — Chapter XXII · THE INDUSTRIAL APPLICATIONS OF TITANIUM AND ITS COMPOUNDS

Weedon, Trans. Amer. El. chem. Soc. 1911, 16, 217.

[637] D. R. P. 231231, February, 1911.

[638] Ibid. 233125, March, 1911.

[639] Ibid. 251837, October, 1912.

[640] Ibid. 234466, May, 1911.

[641] E. 6500, 1912.

[642] Guay, U. S. P. 1039522, September, 1912.