>146. When powder is sent on board any vessel at the Yard, an Ordnance Officer or the Gunner is to see it properly stowed, and the Ordnance Officer is to hand to the Captain of the vessel a statement showing the quantity of powder, number and capacity of tanks, kind of charges contained in each, with the initial velocity, maker, and date of reception, with a list of small-arm and boat ammunition, fireworks, filled and other shells and projectiles, together with all the information directed by the three articles immediately following, with such remarks as he may deem proper to secure better precaution or more convenient arrangement, with a request that the memorandum, or a copy of it, may be delivered to the Ordnance Officer at the Yard where the vessel is refitted or laid up at the end of the cruise.
147. When cartridges are filled for issue to any vessel, the powder should be selected, as far as practicable, from deliveries made by the same person, and at the same time or date; and the tanks in which they are stowed must be marked with white paint on the upper sides, with the same marks as the barrels from which the powder was taken, giving the date of manufacture and the maker's name.
148. Great irregularities having been observed in the weights of cartridges supplied from different stations, it is ordered that at least ten measures shall be weighed at each filling, and allowance made for different densities. (See [Art. 171.])
149. Whenever powder is returned into the powder-houses from vessels, and the powder emptied from the cartridges, care must be taken to have the barrels or other vessels in which the powder may be placed marked in the same manner and registered in the Magazine Ledger, so that the maker's name and date of manufacture of all powder may be correctly known and carefully preserved for reference.
150. The names of vessels from which powder is received, the length of time which the powder has been on board, and the station on which the vessel has been employed, should also be noted and reported by the Ordnance Officer, that reference may be had to the notes in case it should be desired in subsequent examinations of the powder.
151. In some instances where powder has been condemned by survey, it has been directed to be thrown overboard. This should never be done; the nitre contained, which forms three-fourths (¾) of the powder, is still perfectly good, and can be made serviceable. In future, condemned powder is always to be returned to the United States.
152. The Ordnance Officers, when they supply vessels with powder, or remove any from them, must report to the Bureau by the earliest opportunity all the information which is required to be noted by Articles 147, 149, 150, immediately preceding; and when powder is received from vessels returning from cruises, or after it has been long embarked, they are to forward to the Ordnance Yard, Washington, a sample of two pounds and one-fourth, properly labelled, for every five hundred pounds landed, selected so as to show fair average samples of the whole, in order that its strength may be ascertained by the pendulum.
153. In case of necessity, powder for saluting may be purchased abroad in order to preserve a supply of our own proof powder for battle.
154. When a vessel is about to leave a foreign station and return directly to the United States, and other vessels belonging to the Navy are left on the station without a full supply of powder, the vessel which is about to leave may be directed to transfer to those remaining on the station any excess of powder that may be on board beyond fifty rounds.
155. Should it become necessary to use powder for service charges which has not been regularly inspected and proved in the manner required by regulations, such tests of it must be made as circumstances will admit.