1. A cooperable container system for separate storage of an explosive comprised of a liquid and a particulate component to facilitate absorption of the liquid into the particulate component to arm the explosive comprising: a first container adapted to contain said particulate component having an opening adapted to receive removable closure means and selected to accept the addition of a predetermined volume of liquid to its contents, and a second container adapted to contain a liquid and having spout means extending therefrom, said spout adapted to be received within the opening of said first container in an inverted position with respect to the first container while permitting air to escape from the opening of the fluid container whereby the maximum level of liquid in the first container will be limited to a predetermined maximum below the opening of the first container.

2. A cooperable container system for separate storage of an explosive comprised of a liquid and particulate component to facilitate absorption of the liquid into the particulate component to arm the explosive comprising: a first container means having an opening adapted to receive removable closure means, a second container adapted to contain a preselected volume of liquid and having spout means associated therewith, said spout adapted to be received within the opening of said first container in an inverted position and having discharge means therein whereby said spout depends a predetermined distance into said first container in said inverted position to establish a liquid seal at the discharge opening to regulate the flow from said second container to said first in responsive to the rate of absorption, and cooperative means on each of the first and second containers for supporting said second container in said inverted position.

3. A method of arming an explosive having at least a first particulate component in a first container having an opening and a second liquid component in a second container, said method comprising: placing said second container in an inverted position relative to said first container whereby said second container discharges into said first container, regulating the discharge from said second container in response to the level of liquid in said first container by positioning said second container with the discharge means depending into said first container to discharge at thE maximum predetermined liquid level whereby a predetermined increase in the liquid level will seal the discharge means, thereby terminating the flow from said second container until said liquid level recedes below said discharge means, removing said second container from said first container and closing said first container, and attaching detonator means to said first container.

6. A cooperable container system for separate storage of explosive components to facilitate mixing comprising: a liquid container containing a preselected volume of liquid and having an openable spout means extending from the upper end, said liquid container being sealed except for the open spout, a particulate container containing a particulate explosive component and having a top opening adapted to receive the spout of the liquid container when the liquid container is inverted, and being further adapted to support the liquid container with the lower end of the spout spaced below the top opening of the particulate container, the particulate container being vented to atmosphere when the spout of the liquid container is positioned in the top opening such that liquid will rise only to a limited level below the opening in the particulate container as a result of atmospheric pressure acting on the liquid.

12. A method of arming an explosive having at least a liquid and particulate component comprising: charging said particulate material in a first container having an opening, said container being selected to receive a predetermined amount of liquid in addition to its particulate contents, storing said liquid component in a second container having discharge means associated therewith, arming said explosive by placing said second container in an inverted position with the discharge means depending into the opening in said first container while venting the first container to atemosphere such that the discharge from the second container will be automatically regulated in response to the rate of demand into the particulate component by atmospheric pressure to maintain the liquid below a predetermined level in said first container.