FOOTNOTES:
[13] See an article by T. Egleston, PH.D., in "The Book of Mines," vol.
vii, No. 4, July, 1886.
[14] The American Journal of Science and Arts, vol. xix, page 448.
Fifty years with the Revere Copper Co. A Paper Read at the Stockholders' Meeting held on Monday 24 March 1890 · 第 20 / 23 题