768 



Popular Science Monthly 



grained pine, 1 in. in diameter at center, 

 tapering to ^4 in. at ends, and 6 in. 

 longer tlian the edge of sail to which they 

 are to be laced. This will allow for 

 stretching of sail and for minor errors in 



Diagram of mainsail and mizzen of a forty- 

 five and twenty-three square-foot sail area 



cutting and sewing sails to correct di- 

 mensions. 



If you are a good enough mechanic to 

 shape your spars from squared stuff, 

 working down to an octagonal surface and 

 then to a tapered round, very well, other- 

 wise let a wood-working establishment 

 shape them out from a dimensional 

 sketch. As the masts will be short 

 enough to be turned, they may be pro- 

 cured from a mill made to sketch at little 

 more cost than the squared stock. Shape 

 the spars first, and smooth and varnish 

 them. Three thin coats of good spar 



Method of lacing the seizing line through 

 screw-eyes and grommet loops alternately 



varnish, well dried and smoothed down 

 between each coat, is better than one 

 heavy coat. A wire nail driven into ends 

 of spars will allow varnishing them clear 

 up to the ends without finger marks and 

 also serve to suspend them while drying. 



Each yard is joined to its boom by a 

 pair of heavy brass screw-eyes of from 

 '^i to 1 in. inside ring diameter, screwed 

 into forward ends of booms and spars and 

 connected by a heavy 13-^-in. brass ring. 

 Screw-eyes are opened to admit the rings 

 and then closed upon them. Capping 

 the ends of boom and spar with "^/i in. 

 brass ferrules will obviate danger of 

 splitting. 



Lay one of the sails out on the floor and 

 lay its yard and boom along its proper 

 edges. Tie with seizing line the forward 

 corner grommet to the connecting ring, 

 and stretch the sails out along boom and 

 yard, fastening them temporarily to their 

 ends. With a soft pencil mark along 

 boom and spar 1 in. each side of where 

 each grommet (except corner and end 

 grommet) comes. Set a line of brass 

 screw-eyes. Fig. 7, (3/16 in. inside diame- 

 ter) along booms and spar at these marks, 

 being careful to keep them in line, and 

 that eyes are at right angles to length of 

 boom or spar. Tie a loop or ring of seiz- 

 ing line through grommet, excepting the 

 corner end ones. Then lace a piece of 

 seizing line alternately through these 

 loops and the small brass screw-eyes. 



flag 



Hq 10 



The boom jaws, round mast plate and the 

 flag pole plate are shown in the above sketch 



Stretch the sail moderately taut, fasten 

 the outer ends by their grommets to 

 screw-eyes set out as far as possible on 

 boom and yard, and then, fastening the 

 lacing at one end to the forward small 

 screw-eye, draw it taut and lash it to the 

 rear one, leaving a foot of extra line for 

 slacking up, which may be wound around 

 boom or spar after the last knot is tied. 

 You may buy boom jaws or make them 

 yourself. In the latter event, get a piece 

 of 1 2-m. half-round brass, 22 in. long, and 

 saw it in halves. Bend and hammer each 

 piece into the shape and dimensions 

 shown in Fig. 8, being careful to have flat 

 surface inside the curve. At a point ^i 

 in. from end of the 3 in. arm drill "and 

 countersink for a 3/16 in. flat-headed 

 machine screw. The same distance from 

 the curve of gooseneck, drill and counter- 

 sink for another. With two brass ma- 



