Fig. 6 and 7. Plate IV. explain a third method of securing decayed Timbers.

Fig. 6, gives a side-view of a decayed girder: a, represents the templet; b, an iron lever, six feet long, nearly strait, being only cambered one inch, three inches wide, and three-quarters of an inch thick; this lever extends along the side of the girder c, and is secured fimly to it by the side-irons dddd, which are two inches wide, and full half an inch thick, pointed at the ends. The higher ends of these side-irons are driven into the girder, and the lower points pass through holes in the lever, into the lower part of the girder, and are held close to the girder by staples eeee: the side iron next the templet may be fixed slanting, in order that it may enter sounder wood. A claw, f, which is part of the lever, rests on the wall-plate a, and is bedded in it; an iron plate, g,

lying under the girder and let into it, passes through the lever at h, connecting it with a similar lever on the opposite side, and which assists in the same way to support the girder: i, is a flooring joist, to show how deep the levers are inserted therein.

Fig. 7, shows the under part of the same girder; bb, are the bottoms of the two levers above mentioned, fixed to the girder by the side irons and staples before described; kk, the broad feet of the levers which lie flat upon the wall plate; ff, the two claws projecting from the feet, in order to bed in the wall plate; iiii are joists, partly cut through, to admit the iron levers to lie close to the

girder: g shows the iron plate or collar

on which the Girder bears; it is turned up an inch and a half at each end, to keep the levers close to the sides of the girder. This collar should be made out of inch-bar iron, with points projecting from it, in the same manner as the

collar

collar at DD, Fig. 1, to connect it with the levers, by passing through holes made through them for that purpose.

To fix the levers, put a shore two feet six inches from the wall, under the girder, to support it; then cut off the decayed end, and take out the templet, or part of the wall plate if decayed; and put in a stone templet for the irons to rest upon, with mortices in the stone to admit the claws of the lever: then fit the collar underneath the girder, two feet from the wall, to answer the holes in the lever; make an incision in the joists three-fourths of an inch wide, and three inches deep, to admit the levers; fix the levers on each side with the collar, so as to force up the levers together; then with slight shores force up the ends of both levers together, and fix the side-irons firm. The girder will thus be perfectly safe.

The templet or wall plates, on which the levers rest, are made of Portland stone,

stone, three feet long, nine inches wide, and five inches deep, with incisions or mortices made therein for the claws of the levers.

Certificates, confirming Mr. Woart's Improvements, were received from the Commissioners of the Navy, from Mr. Joseph Harris, smith, at Putney, and Mr. George Smith, surveyor, at Putney.