*M*ROVE» JURY MASTt. 45 



Usually Carried on board King's ships, and in every mer- * H 4 capable of 

 ehantman that is properly found. By having jury masts so muchsaU** 

 fitted, ships will be enabled to carry as much sail as obi the the proper 

 usual regular mast; the great use of which I need not dwell mas * 

 on, only observing, that it may be of great importance to 

 fleets after a general action, or when in want of proper lower 

 masts, either at home or abroad* and enable ships, after the 

 loss of their mast, to prosecute their voyage, or service, with* 

 •ut any deficiency of sail. 



I beg you will be pleased to lay it before the Society, and 

 I have the honour to be, 



Sir, 



Your obedient humble servant, 



WM. BOLTON. 



REMARKS. 



In the model in the Society's possession the main mast is Method of <*»> 

 feroken about one third of its length above the deck, proper ? truclin « th * 

 partners are secured on the deck, in which a hand mast and JUrJ ****** 

 spare main top mast are fixed on each side of the broken 

 main mast, and secured thereto by two spare caps, morticed 

 ©n a square made in its centre. A strengthening cap, mova- 

 ble on these additional masts, connects them, and the upper 

 parts of these masts are sec, red firmly by trustle trees in the 

 main top. The foot of a spare fore topmast passes through 

 a cap made from strong plank, morticed into the heads of the 

 two temporary masts above mentioned, goes through the main 

 top, and rests in the movable strengthening cap, which con-» 

 nects those two masts, and enables the fort- topmast to be 

 raised to any height which the main top will admit, and be 

 then firmly secured by the upper cap, the main top, and the 

 strengthening cap below it. The fore topmast being thus 

 adjusted, the cross trees and topgallantmast are mounted 

 upon it, which completes the whole business. 



Two caps are the only things necessary to be made express- 

 ly for the purpose, the other articles being usually ready o« 

 board the ship. 



It 



