| It was a waste product from the production of radium from the pitchblende deposits around Great Bear Lake in northern Canada. |
| He was probably one of the few Canadian prospectors of that time who could have identified the pitchblende mineral. |
| The hint of a new element in pitchblende materialized in July 1898, when the couple reported gathering a substance that was 400 times more active than metallic uranium. |
| The first discovery of pitchblende in the United States was associated with gold ores at the Wood mine in Gilpin County. |
| During the early years of radium and uranium refinery operations in Port Hope, highgrade pitchblende ores were processed. |
| It is worth recalling the history of this treatment, which began when American, James Douglas, discovered extensive pitchblende deposits on his Western mining properties. |
