ROPE. MAKING. 



Table I. 



N. B. The calculations of B and C will be found extremely ufeful, provided the yarn be fpun and tarred regular, as 

 by weighing one iingle yarn, or even ten fathoms, the fize of the yarn may be afcertaiued, without being at the trouble 

 of weighing the hawls. 



Table II. 



Shewing the Number of Threads to work per Hook for three-ftrand cable-laid Cordage 016, 12, 18, and 24 Inches 

 in Circumference, of the undermentioned Sizes of Yarn, with the Girt of each Strand, and Weight of each Cable : 

 alfo the Number of Men required to lay both Strands and Cabl.*, witn the Allowance to each Man for his Labour. 



* Six threads are called a quarter of a day's work, for which each workman is paid 77/., and fo on in proportion for a 



greater or lefs number. 



Remarks and Directions how to apply Tables I. and II. 



Example. — Suppofe a cable of 1 2 inches in circumference 

 is wanted to be made, the hawls of yarn out of which, upon 

 examining the weights, are found to weigh 16 cwt. 2 qr. 10 lb. 

 per hawl of 3 36 threads. A reference is to be made to Table 

 I. line E, and the weight, being between 16 cwt. 2 qr. olb. 

 and i6cwt.2qr. 18 lb. will be found to anfwer to 18-thread 

 yarn. Then look down the 18-thread column, Table II., 

 and upon the line of 12, (the fize in the margin,) is found 

 80 threads per hook, which is the number of threads to be 

 laid up per hook for the cable to be made of the weight per 

 hawl of yarn of 336 threads above fpecified. 



Again, if the hawls of yarn mould be tarred of fuch a 

 weight (fay for example) requires to be worked between a 



17 and an 18-thread yarn, in fuch cafe take the number of 

 threads per hook to be worked for the lize of the cable de- 

 manded, as mould be worked both for 17 and 18-thrcad 

 yarn ; add them together, and take half the number of 

 threads fo added, to worker hook for the cable ; but if 

 there mould happen in dividing to be an odd thiead remain- 

 ing, you muft obferve to which fide the weight of your 

 hawl of yarn is mod inclining, and throw the thread in dif- 

 pute to the heavieft fide. The fame rules muft be obferved 

 in confulting all the following tables. 



Remarks. — In laying three-ftrand cable-laid cordage, if 

 you are in doubt relpefting the fize of your yarn, you muft 

 girt the yarn you purpofe laying in one ftrand, and that 

 mould be half the fize of your cable. 



In hardening the ftrands in the laying of cable-laid 



cordage, 



