ISO NOTES ON LIFE-SAVING APPLIANCES. 



details such as bolts, nuts and screws not included. I agree that the pin-davit 

 looks more simple and also weaker. This weakness does not belie its appearance, 

 but its simplicity is an optical illusion. 



The frame of the Norton davit is twice as long as that of the Welin davit 

 for the same conditions, taking up twice as much deck space. 



Welin davits have been made of structural steel but are used only on small 

 sizes. If one considers its working principles, the theoretical advantage of the 

 Welin davit is very marked. The arm goes over to the place where the load is, 

 picks it up and goes to the extreme outboard position, thus swinging the load to 

 the desired place, whereas the arm in the Norton davit, being pivoted, remains at the 

 same point, stretches as far inboard, takes the load on the long outstretched, unsup- 

 ported arm, swings the load to position, requiring about four times as much work. 



For simplicity, substantial construction and reliability the quadrant davit 

 remains as yet unsurpassed. 



Mr. Forbes: — The idea of this paper was to suggest something about life- 

 saving appliances, and I laid down certain requirements. I do not think any of 

 those who have discussed the paper have disproved my ideas or found them incor- 

 rect. Captain Lundin, I think, misunderstands my idea of boat control. It was 

 not my idea that the apparatus should be in the boat itself, but on the deck of the 

 ship, with a connection in the hands of the man in the boat. 



Mr. Berry has found that the hencoop system does not please him very much, 

 and I think with him it would take a good deal of nerve to stay on the deck of a 

 boat, even if it was ashore, with a platform that was being knocked out from under 

 you, and I rather trust to the hencoops. The Welin davit is known to me as is the 

 worm and wheel-moved davit. This last-named davit has no suitable variable out- 

 reach ; it has merely a variable outreach, but it is in the arc of a circle. 



Mr. Norton's sheath davit is an excellent davit, but I fail to see why we need 

 the sheath in protecting the screw if the force of the boat striking it would not bend 

 it. The Commonwealth, at the time that the accident referred to by Mr. Gardner 

 occurred, was in perfectly calm water, and the crew were able to get the boat down 

 in quick time; just what I stated was to be expected. But it must be remembered 

 this was in smooth water. 



It seems to me that my paper stands this way — I have discussed certain things 

 for the purposes of life-saving which are ideal, and which ought to be worked for, 

 even though it may not be practicable to reach them at the present time. 



