ign-board, and the first
gun of each class belonging to a vessel is to be marked with the name
of the vessel.

49. The Officer on Ordnance duty will examine all the guns in the yard
and on board vessels in ordinary, at least once in every two weeks,
and take care that they are kept protected from rust or any other
injury, and will report to the Bureau whenever any additional
precautions or arrangements are required for their proper
preservation, and which may not be furnished by the order of the
Commandant of the Yard.

50. No cutting, boring, or chiselling of guns is to be done at any
time without express authority from the Bureau.

51. No condemnation of guns or small arms belonging to the Navy is to
be made, except upon surveys specially ordered, and confirmed by the
Chief of the Bureau; nor of other articles which have been furnished
under his authority, or by his direction, unless by surveys ordered or
sanctioned by him.

52. When guns and their equipments are to be put on board vessels for
their armament, the guns are to be carefully and thoroughly cleaned
and examined, to see that they are in all respects in proper
serviceable condition.

The vents should be examined with the vent-gauges and searchers, to
see that they are clear from any substance which may obstruct the use
of priming-wires and primers.

53. The carriages are also to be carefully examined, the
trunnion-holes and arms of the axletrees cleaned, and saturated with
boiled linseed oil, the cracks filled with putty, and rubbed smooth,
and the trunnion-holes black-leaded. The iron work should be freed
from rust, all screws be made to work easily, and be well cleaned and
coated with proper composition.

54. The Ordnance Officers will see that the sights are properly fitted
and marked for their proper guns. The greatest care should be taken
that they are properly adjusted, as the efficiency of the ship depends
on it, and it is difficult to detect or remedy any error after they
are placed on board; that the beds and quoins are fitted and adjusted,
and the quoins graduated to degrees or distances to correspond with
those marked on the sight-bars. Porter's quoin is adopted for all
carriages requiring quoins.

55. New guns are to have locks fitted to them before being put on
board ship. Those having two lugs will have the one on the right
fitted; the other is to be left solid.

56. When the guns are to be shipped for transportation merely, the
s