ROPE-MAKING. 



Table XVIII. 



Shewing the fhrinking Proportions of the Yarn, in making the undermentioned Lengths of Bolt-Rope ; alfo its Weight 



(untarred), from i to 8 Inches in Circumference. 



Remarks. — In hardening the itrands, the yarn will (lirink 

 one-fixth part of the whole length, which is called the 

 rope's hardening mark. 



In laying the rope, the ftrands will fhrink one-feventh 

 part of the remaining diftance, which brings the rope to the 

 length required. 



N. B. Bolt-rope is ufually made of 20 or 25-thread 

 yarn, and generally delivered from the rope-maker white ; 



the procefs of tarring it being ufually performed by the 

 fail-maker, and is called (loving it, it being done in a Hove 

 or oven calculated for the purpofe. In laying up your 

 work, you mult work with the fame number of threads as 

 in common hawfer-laid cordage. Bolt-rope, for exporta- 

 tion, is fometimes lightly tarred ; in which cafe, in cal- 

 culating the weight, you muft add one-fixth to the weights 

 hereunto annexed. 



Table XIX. 



Shewing the Number of Threads to work per Hook for three-ftrand hawfer-laid white Cordage, from 

 1 to 12 Inches in Circumference, of the undermentioned Sizes of Yarn, with the Weight of each 

 Rope prefixed. 



N. B. Efpecial care fhould be taken relative to making 

 white cordage for tackle-falls, crane-ropes, &c. that the 

 hemp be of the very bed quality ; and that the fame be 

 topped, viz. all the Ihort hemp taken out by the hatcheller ; 



and that the fpinner do fpin hie yarn for the fame exceeding 

 fmarl and even, by no means lighter than the weight fpc- 

 cified under the article /pinning the yarn : if he does, liw 

 rope will not anfwer the iize required to be made. 



Vol. XXX. 



I 7. 



Taelt 



