United States arsenal grounds, Fortieth and Butler streets, Pittsburg,
Pa., at the time the explosive is to be tested; and he is to have a
representative present during the tests, who will be responsible for
the handling of the packages containing the explosives until they are
opened for testing.

“(2) No one is to be present at or to participate in these tests
except the necessary government officers at the testing station, their
assistants, and the representative of the manufacturer of the
explosives to be tested.

“(3) The tests will be made in the order of the receipt of the
applications for them, provided the necessary quantity of the
explosive is delivered at the plant by the time assigned, of which due
notice will be given by the Geological Survey.

“(4) Preference will be given to the testing of explosives that are
now being manufactured and that are in that sense already on the
market. No test will be made of any new explosive which is not now
being manufactured and marketed, until all explosives now on the
market that may be offered for testing have been tested.

“(5) A list of the explosives which pass certain requirements
satisfactorily will be furnished to the state mine inspectors, and
will be made public in such further manner as may be considered
desirable.

“TEST REQUIREMENTS FOR EXPLOSIVES.

“The tests will be made by the engineers of the United States