QSS SiCx'rNG 1IV2S rv case of siirrwEECjt. ■ 



Aball carrying Fvcrr. a boat moored about 250 yards from shore, toe 



40o"yards"froni ^^®'^ ^^* thrown 150 yards on shore, w\ih the rope attached 



*boat. to it; the shell was of oast iron, filled with lead, it weighed 



75 ib«., its diameter 8 inches; the rope in the trial was a 



deepsea-line, of which l60 yards weighed 18 lbs; the angle 



of the mortiir, from which the shell was fired* was 45 de* 



grees. By means of the hne, Mr. Bell and another man- 



y.'orked themselves on shore upon his raft of casks ;' there 



were many kinks in the rope, which were with ease cleared 



by Mr. Bell, in which he was much assisted by his snatch 



blocks. 



A second trial The second trial was repeated in a similar manner, and 



succceacd ^^.||.}^ equal success, the shell falling: within a few yards of 

 equally. ^ . " . -^ 



the former place, the gale of wind was bnsk, aiid the water 



rough. The diiection of the shell was nearly from northtdfl' 



south, and the wind blew nearly north-west^ 



Inch and half In the third trial, the moi-tar was elevated to 70 degrees ; 



^r?f ^''T"'^ the rone attached to the shell wns an inch and half tarred 



IbO yards. ' ^ 



rope, of which every 50 yards weighed fourteen pounds and 



a half ; the shell of the kind above mentioned. It fell l&O' 



yards from the mortar, and buried itself about two thirds 



in the ground; the line or rope ran out was about 200 



yards, and it required the force of three men to draw. the 



shell out of the ground at that distaTice. 



T-yo men The gronimet, in all these trials, was of white three incli 



selves cu shom ^^pe ; and in all the aDove trials, by means ot the hne, two 



by it. men worked themselves on shore upon tlie raft: each oharg-e 



of powder was fifteen ounces. 



A f^'apnel not ^ fourth e:iperim,ent v/as made by fiiinf]:, from the saiKtV; 



so i'ood. 1 . 1 . ,. ,■ '.'- .■ •■ 



mortar, a graprsel lu a wooden case; it dici not retain its 



hold in the ground so well as the shell, but amongst the 



crevices of rocks, or w^heie the vessel' is near shore, will be 



useful. 



Grapnel with ' ^ grapnel of this kind may be fired from a common caH- 



rope. ^ iion with an endle:>s rope, rurmrng In a pulley or small block" 



engravinr; having been omitted at that time, it was thought ekpedient' to 

 insert it in the present publicatiou, with some further particulars then 

 oniitted.' 



Model's and Drawings of the whole apparatus are reserved in the So- 

 ciety's Repository, for the inspection of the public, 



fixed 



