...Ingersoll claim yielded a mass of a ton's weight. This mineral is hero quite commonly called tantalite, but all analyses so far made for me at the Dakota...to be the predominating acid. The crystal form is alwaj'S tabular, while the habit of tantalite is prismatic. A sample, however, from the Etta mine,...

...well as a great number of specific gravity tests, have invariably shown that it is columbite. Tantalio acid is always present in varying quantities, but...acid. The crystal form is always tabular, while the habitus of tantalite is prismatic. A sample, however, from the Etta mine, analyzed by Professor Scbaeffer,...

...Prof. WP Blake to have yielded a mass weighing a ton. This mineral is here frequently called tantalite; but all analyses so far made for me at the Dakota...specific gravity tests, have invariably shown that it is coluunbite. Tantalic acid is always present in varying quantities, but never to such a degree...