A. Microphotograph of polished ore from Barber
Bill property, Ninemile mountain, magnified 250
diameters. Jamesonite later than zine blende. il.
zinc blende; 2, jamesonite; 3, arsenopyrite; 4, quartz.
(Page 35).

ls. Microphotograph of polished ore from Ninemile

mountain, north side, magnified 66 diameters.

Arsenopyrite in a calcite gangue, partly replaced by

jamesonite. 1, jamesonite; 2, calcite; 3, arsenopyrite

57091 partly replaced by jamesonite. (Page 35.)