studdingsail tacks coiled away at the yard-arm, and hitched down to the boom and yard. This is a clumsy practice, and saves no time or trouble. The best way is to unreeve them whenever the boom is to be rigged in, and coil them away in the bow of the long-boat, or elsewhere. There is no more trouble, and less liability to confusion, in reeving them afresh, than in coiling them away and clearing again on the yard-arms.) Carry your tack outside the backstays and lower rigging, clear of everything, out upon the lower yard under the brace; reeve it forward through the tackblock at the boom-end, first sluing the block up, and pay the end down forward of the yard. Rig the boom out to the mark and lash it. Get the studding sail on the forecastle clear for setting. Bend the halyards to the yard, about one half of the way out. Hitch the end of the downhaul over the inner yard-arm by the eye in its end, reeve it through the lizard on the outer leech, and through the block at the outer clew abaft the sail. Bend the tack to the outer clew, and take a turn with the sheet. Clew the yard down by the downhaul, and make the downhaul up just clear of the block, by a catspaw doubled and the bight of the running part shoved through the bight of all the parts, so that hauling on it may clear it and let the yard go up. Hoist on the halyards until the sail is above the lower yard, guying it by the sheet and downhaul, then haul out on the tack until the clew is chock out to the boom-end, hoist on the halyards, jerking the downhaul clear, and trim down the sheet.

TO TAKE IN A TOPMAST STUDDING SAIL.-Lower away handsomely on the halyards, clewing the yard down to the outer clew by the downhaul. Slack up the tack, and lower away on the halyards, hauling down well on the sheet and downhaul, till the sail is in upon the forecastle. The sail may be made up on the forecastle, and the end of the tack and halyards made fast forward, if it is to be soon set again. If not, cast off all, unreeve your tack, hauling from aft, and coil it away. Unreeve the halyards, or round them up to the block at the masthead with a knot in their end. Rig the boom in, and lash it to the slings.

TO SET A LOWER STUDDING SAIL.-Before rigging out the

topmast studding sail boom, the lower halyards should always be rove, as before directed. Reeve the inner halyards out through a small single block under the slings of the lower yard, and through another about two thirds of the way out, and pay the end down upon the forecastle for bending. Get the studding sail clear, bend the outer halyards to the yard, and the inner halyards to the inner cringle at the head of the sail. Reeve the outhaul through the block at the swinging boom end, and bend the forward end to the outer clew of the sail. Hook the topping-lift and forward guy to the boom, and top up on it. Haul on the forward guy, and ease off the after one, slacking away a little on the topping-lift, until the boom is trimmed by the lower yard; then make fast the guys and lift. Haul well taut the fore-lift and brace, and belay. Take a turn with one sheet, hoist away on the outer halyards, and when about one-third up, clear the downhaul, haul chock out on the outhaul, and hoist well up by the halyards, which will serve as a lift to the topmast studding sail boom; and then set taut on the inner halyards and trim down the sheet. The practice now is, and it is found most convenient, to set the sail before rigging out the boom; then clap on the outhaul and forward guy, and trim the boom by the lower yard.

TO TAKE IN A LOWER STUDDING SAIL.— -Let go the outhaul, and haul on the clewline till the outer clew is up to the yard. Then lower away the outer halyards, and haul in on the sheet and clewline. When the sail is in over the rail, lower away the inner halyards. If the booms are to be rigged in, cast off all the gear; making the bending end of the outhaul fast in-board, and unreeving the outer and inner halyards, or running the outer up to the pennant block, and the inner up to the yard block, with knots in their ends. Ease off the forward guy with a turn, haul in on the after guy, topping well up by the lift, and get the boom alongside. Rig in the topmast studding sail boom before unreeving the outer halyards. It is a convenient practice, when the swinging boom is alongside, to hook the topping-lift to a becket or thimble at the turning in of the fore swifter, and the forward guy to a strap and thimble on the spritsail yard.

In strong winds it is well to have a boom-brace-pennant fitted to the topmast studdingsail boom-end with a single block, making a whip purchase, the hauling part leading to the gangway, and belaying at the same pin with the tack; or else, the brace may lead to the gangway, and the tack be brought in through blocks on the yard, and lead down on deck, beside the mast. The former mode is more usual.

The topmast studding sail is sometimes made with a reef in it, to be carried with a single reefed top sail; in which case it is reefed on deck to the yard and sent out as before.

CHAPTER X.

GENERAL PRINCIPLES OF WORKING A SHIP.

Action of the water upon the rudder. Headway. Sternway. Action of the wind upon the sails. Head-sails. After sails. Centre of gravity or rotation. Turning a ship to or from the wind.

A SHIP is acted upon principally by the rudder and sails. When the rudder is fore-and-aft, that is, on a line with the keel, the water runs by it, and it has no effect upon the ship's direction. When it is changed from a right line to one side or the other, the water strikes against it, and forces the stern in an opposite direction. For instance, if the helm is put to the starboard, the rudder is put off the line of the keel, to port. This sends the stern off to the starboard, and of course, the ship turning on her centre of gravity, her head goes in an opposite direction, to port. If the helm is put to port, the reverse will follow, and the ship's head will turn off her course to starboard. Therefore the helm is always put in the opposite direction from that in which the ship's head is to be moved.

Moving the rudder from a right line has the effect of deadening the ship's way more or less, according as it is put at a greater or less angle with the keel. A ship should therefore be so balanced by her sails that a slight change of her helm may answer the purpose.

If a vessel is going astern, and the rudder is turned off

from the line of the keel, the water, striking against the back of the rudder, pushes the stern off in the same direction in which the rudder is turned. For instance, if sternway is on her, and the helm is put to the starboard, the rudder turns to port, the water forces the stern in the same direction, and the ship's head goes off to the starboard. Therefore, when sternway is on a vessel, put the helm in the same direction in which the head is to be turned.

A current or tide running astern, that is, when the ship's head is toward it, will have the same effect on the rudder as if the ship were going ahead; and when it runs forward, it will be the same as though the ship were going astern.

It will now be well to show how the sails act upon a ship, with reference to her centre of rotation. Suppose a vessel to be rigged with three sails, one in the forward part, one at the centre, and the third at the after part, and her left or larboard side to be presented to the wind, which we will suppose to be abeam, or at right angles with the keel. If the head-sail only were set, the effect would be that the wind would send the vessel a little ahead and off to the starboard on her centre of rotation, so as to bring her stern slowly round to the wind. If the after-sail only were set, the vessel would shoot ahead a little, her stern would go off to the starboard and her head come up into the wind. If only the centre sail were set, the effect would be the same as if all three of the sails were set, and she would go ahead in a straight line. So far, we have supposed the sails to be set full; that is, with their tacks forward and their sheets aft. If they were all set aback, the vessel would go astern nearly, if the rudder were kept steady, in a straight line. If the head sail only is set and aback, she will go astern and round upon her axis, with her head from the wind, much quicker than if full. So, if the after sail alone were set and aback, she would go astern, and her head would come suddenly into the wind.

These principles of the wind acting upon the sails, and the water upon the rudder, are the foundation of the whole science of working a ship. In large vessels the sails are numerous, but they may all be reduced to three classes, viz., head sails, or those which are forward of the centre of

gravity or rotation, having a tendency to send the ship's head off from the wind; after sails, or those abaft the centre of rotation, and which send the stern off and the head toward the wind; and lastly, centre sails, which act equally on each side the centre of rotation, and do not turn the ship off her course one way or the other. These classes of sails, if set aback, tend to stop the headway, and send the ship astern, and also to turn her off her course in the same direction as when set full, but with more rapidity. The further a sail is from the centre of rotation, the greater is its tendency to send the ship off from the line of her keel. Accordingly, a jib is the strongest head sail, and a spanker the strongest after sail.

The centre of rotation is not necessarily at the centre of the ship. On the contrary, as vessels are now built, it may not be much abaft that part of the deck to which the main tack is boarded. For the main breadth, or dead flat, being there, the greatest cavity will also be there, and of course the principal weight of the cargo should centre there, as being the strongest part. Therefore, the centre of rotation will greatly depend upon proper stowage. If the ship is much by the stern, the centre of rotation will be carried aft; and if by the head, it will be carried forward. The cause of this is, that when loaded down by the stern, her after sails have but little effect to move her stern against the water, and a very slight action upon the forward sails will send her head off to leeward, as she is there light and high in the air. Accordingly, to keep her in a straight line, the press of sail is required to be further aft, or, in other words, the centre of rotation is further aft. If a ship is loaded down by the head, the opposite results follow, and more head and less after sail is necessary.

A ship should be so stowed, and have her sails so trimmed, that she may be balanced as much as possible, and not be obliged to carry her helm much off the line of her keel, which tends to deaden her way. If a ship is stowed in her best sailing trim, and it is found, when on a wind, that her head tends to windward, obliging her to carry a strong weather-helm, it may be remedied by taking in some after sail, or adding head sail. So, if she carries a