%l§ Description of an Improvement in Jury Masts , 
No. 28. 
Description of an Improvement in Jury Masts. By 
Capt . William Bolton, of the Boyal Navy.* 
(With a Plate.) 
SIR, 
Herewith you will receive the model of a plan for 
fitting ships’ jury masts, to he formed from the spare 
spars usually carried on hoard king’s ships, and in every 
merchantman that is properly found. By having jury 
masts so fitted, ships will he enabled to carry as much 
sail as on the usual regular mast ; the great use of which 
I need not dwell 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 prose- 
cute their voyage, or service, without any deficiency of 
sail. 
I beg you will be pleased to lay j.t before the Society, 
and I have the honour to be, 
Sir, your obedient humble servant, 
Wm. Bolton, 
Oct. 31, 1807. 
C. Taylor, M. 13. Sec. 
REMARKS. 
In the model in the Society’s possession the main mast 
is broken about one-third of its length above the deck, 
proper partners are secured on the deck, in which a hand 
mast and a spare main top mast are fixed on each side of 
the broken main mast, and secured thereto by two spare 
caps, morticed on a square made in its centre. A strength- 
* Tilloch, vol. 33, p. 346. From Transactions of the Society for the Encou-i 
ragement of Arts, Manufactures, and Commerce, for 1808. The silver me - 
dal of the Society was voted to Capt. William Boltop f<jr this coipjnuni’Catjon r 
