of Mariners in Cases of Shipivreck, 295 



but a descriptive engraving having been omitted at that time, 

 it is thought expedient to insert it in the present publication, 

 with some further particulars then omitted. 



Models and drawings of the whole apparatus are reserved 

 in the Society's repository, for the inspection of the public. 



The several trials made before a 'committee of the Society 

 at Woolwich, on the 29th of August ] "9!, of throwing a 

 line on shore on this principle, were as follow : 



From a boat moored, about 250 yards from shore, the shell 

 was thrown 150 yards on shore, with the rope attached to 

 it; the shell was of cast-iron, filled with lead, it weighed 

 75 pounds, its diameter eight inches; the rope in the -trial 

 was a deep sea-line, of which 160 yards weighed ]8 lbs; 

 the angle of the mortar from whence the shell was fired 

 was 45 degrees. Bv means of the line, Mr. Bell and another, 

 man worked themselves on shore itpon.'nis 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. 



The second trial was repeated in a similar manner, and 

 with equal success, the shell falling within a few yards of 

 the former place; the gale of wind was brisk, and the water 

 rough. The direction of the shell was nearly from noffl} to 

 south, and the wind blew nearly north-west. 



In the third trial, the mortar was elevated to 70 degree's ; 

 the rope attached to the shell was an inch and half tarred 

 rope, of which every 50 yards weighed fourteen pounds and 

 a half ; the shell of the kind above mentioned: it fell 160 

 vards from the mortar, and buried itself about two thirds in 

 the ground ; the line or rope run out was about 200 yards, 

 and it required the force of three men to draw the shell out 

 of the ground at that distance. 



The grommet, in all these trials, was of white three inch 

 rope; and in all the above trials, by means of the line, two 

 men worked themselves on shore upon the raft : each charge 

 of powder was fifteen ounces. 



A fourth experiment was made by firing, from the same 

 mortar, a grapnel in a wooden case; it did not retain its 

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



T 4 crevices 



