SHIP-BUILDING. 



wKich are from the plank to the port-fiU I foot 1 1 inches, 2 

 feet 8 inches deep, and fore and aft 3 feet ; and are to be placed 

 equally between and over the gun-deck ports, as circumitances 

 will admit, as (hewn in the iheer-plan, Plate I. The ports 

 on the quarter-deck, round-houfe, and forecaftle, muft be 

 placed hereafter where there is a vacancy between the dead- 

 eyes to admit of them, obferving to place them as nearly as 

 poflible at equal dillances. 



To know the heights, round-up, &c. &c. of the other 

 decks, take them with compaffes, in like manner as the gun- 

 deck was fet off from the given dimenfions ; and by apply- 

 ing them to the fcaleof feet, much repetition will be avoided. 



The round-houfe deck being drawn, draw a line parallel 

 to the top timber-line, and another line three inches above 

 it, which is of the thicknefs of the plank-fiieer, correfpond- 

 ing with the fore part of the round-houfe, fo as to make both 

 plank-flieer and water-way ; fo will the extreme height of the 

 top-lide be defcribed abaft : the plank-lheer, which com- 

 pletes the height of the lide to the fore part of the quarter- 

 deck, is four feet four inches to the under fide above the 

 top timber-line, and parallel thereto. The fore part abreaft 

 the main-maft hances down eleven inches for feven feet abaft 

 the gangway or fore part of the quarter-deck. 



The drift-rail may now be drawn, the under fide of which 

 is two feet ten inches above the top timber-line, and parallel 

 thereto from the hance of the plank-flieer at the main-mall 

 to the quarter-gallery. The drift-rail is four and a half 

 inches deep, and drawn parallel to the under fide laft drawn, 

 and hances as the plank-fiieer abreall the main-maft, and 

 Hops with a fcroU upon the flieer-rail at the gangway. The 

 ftieer-rail may next be drawn : it is fix inches deep, and 

 parallel to the top timber-line from the cat-head to the 

 quarter-gallery. The plank-fheer and (heer-rail at the fore 

 part of the (hip delineate the height of the top-fide there : 

 the under fide of the plank-llieer is two feet nine inches 

 above the top timber-line, and the under fide of the drift- 

 rail one foot eight inches, and turns off with fcroUs at the 

 after part of the forecaftle, but in other rclpetls the fame as 

 thofe at the quarter-deck. 



It is the practice in the navy of late years, to have fquare 

 drifts inilead of Icrolls or hances of any kind. 



The upper part of the Ihip bemg thus far complete, we 

 have at one view the utmoft extent of the ftieer, as feen on 

 a plane. 



It now remains to be drawn in the finiftiing parts, as the 

 wales, item, head, rails, &c. 



Proceed to reprefent the main wales by fetting up their 

 lower edge, at the rabbet of the item or fore part, above the 

 upper edge of the keel 22 feet 6 inches, m midftiip or dead- 

 flat 18 feet 8 inches, and at timber 34, 23 feet, and draw 

 the curve as in fhecr-plan, Plate I. Above that, and parallel 

 thereto, draw another curve at 4 feet 4 inches, the breadtli 

 of the main wales. 



Next draw in the channel wales, fet up as before, at the 

 rabbet ot the Iti-m 30 feet 2 inches, in midlhips 27 feet 

 3 inches, and at timber 34, 3 1 feet 6 inches. Set up their 

 breadth 3 feet, and draw curves as in {heer-plan, Plate I. 



The waift-rail may be next drawn : its dlilanee below the 

 top timber-line is one loot ten inches, the iipprr fide and its 

 depth fix inches, and it is drawn parnllel to the top-timber 

 line all fore and aft. 



Now, before the channels and dead-eyes can be drawn, the 

 centres and raking of the mails mull be determined ; their 

 centres on th'- gun-deck being fixed \ipon in proportion to 

 the length of the gun-deck, thus,; the centre of the fore- 

 maft is 21 f -et 4 inclies abaft the aft-fide of the Hem, or 

 half its diameter before the one-ninth of the length on tlic 



Vol. XXXII. 



gun-deck : the centre of the main-maft loi feet 4 inchej 

 abaft the aft-fide of the ftem, or half its diameter abaft the 

 five-ninths of the length of the gun-deck : and the centre of 

 the mizcn-maft 27 feet before the rabbet of the ftern-poft, 

 or half its diameter before the one-feventh of the length of 

 the gun-deck. The centre being fixed, the fore-mall rakes 

 aft (or inclines from a perpendicular with the keel) one- 

 eighth of an inch in every yard of its length ; the main-maft. 

 rakes aft one inch in every yard in the length ; and the mizen- 

 mail one inch and a half in every yard of its length, as drawn 

 in the ftiecr-plan, Plate I. 



Now draw the channels, placing their upper edges next 

 the fide in a line with the upper edge of the (lieer-rail ; 

 or, which is much better, fince the rails on the fide are dif- 

 continued, rather lower down, clear of the feam. The 

 fore channel to be 36 feet long, and fo placed as to take 

 the anchor-lining and bill-board for flowing the anchor at its 

 fore end, thus : get the length of the anchor to the bill, or 

 extent of the arm, and allow for the cat -block ; then with 

 that diftance fweep upwards from the channel-wale to the 

 channel, from the outer end of the cat-head nearly, and the 

 curve that the bill of the anchor is fuppofed to inake, wHU 

 give the middle of the lining : the aft-fide from the channel 

 may be perpendicular, and the fore part follow the curve 

 made by the anchor. The bill-board may then be carried 

 upwards from the upper fide of the channel to the top of 

 the fide. The anchor-lining commences at the upper fide 

 of the bolfter, which refts on the channel-wale, and is long 

 enough at the fore part for a man to Hand upon. 



The main channel is 29 feet 6 inches long, placed in the 

 fame range as the fore channel, and its fore-end before the 

 centre of the maft about fix inches. 



The mizen channel is 16 feet 4 inches long, placed like 

 the former, but is more convenient when placed, as it now 

 is, above the quarter-deck ports. 



The dead-eyes may now be drawn, obferving to place 

 them in fuch a manner that the chains may be fufliciently clear 

 of the ports. All the preventer-plates muft be fo placed 

 on the channel-wales, and of fuch a length, that the centre 

 of the chain-bolt may come about fix inches below the upper 

 edge, and the preventer-bolt about four inches above the 

 lower edge of the channel-wales. The dead-eyes in the main 

 and fore channels are fixtcen inches in diameter, and eleven 

 in number in the fore and twelve in the main, though lately 

 another is added in each. In the mi/.en are feven, of eleven 

 inches diatncter ; the centre of the foremoll dead-eye is 

 placed at or jiill abaft the centre of the mall, and the centres 

 of the others are fpaced fo as to clear each other about 

 three inches, which will admit of four dead-eyes between 

 each port. It mull alfo be obferved to give each of the 

 chain and preventer-plates a projier rake ; that is, to let them 

 range in the diredtion of the ftirouds ; which may be done 

 in the following manner : draw a pencil line upwards at the 

 centre of each maft, upon which fet oft its length to the 

 lower part of the head ; then, by drawing llraight lines from 

 that heigiit, through the centre of each de;i(i-eye, the direc- 

 tion of each chain will be obtained by the dii'e(;tion of its 

 correfp inding lijie. The dead-eyes for the backllays arc fn 

 fimilar lo tlie former, that it need only be obterved, that 

 hn- the raking of them, the height of the top-inall to its 

 111' id mull be added to the lower mall, and that they are fixed 

 at tl\e after-end of the channel, or on llools, it need be, 

 above the channels, as in fheer-plan, Plate I. 



The quarter-deck and forecaftle ports can now be detcr- 



nuned, as they muft be plac-d cl'ar of the flirouds, and 



cqu.illy afunder, or ncirly fo, as circumitances will admit : 



ihii3, there arc tliree on each fid.: on the forecaftle, made 



3 Z by 



