228 THE MARINE TEPMINAL OF THE GRAND TRUNK 
The vessel as ‘shown, requiring the full lifting power of the dock, is the 
Minnesota, and lying alongside, to convey more clearly the scale of the 
structure, is shown the new steamer Prince Rupert of the Grand Trunk 
Pacific Railway, now running between Prince Rupert and Vancouver. 
While such a drawing is unusual, its value as a ready means of convey- 
ing information must be apparent to all. The use of similar illustrative 
plans is customary with architects, and it is believed that the practice may 
be adopted to advantage by engineers generally. 
DISCUSSION. 
THE PRESIDENT:—You have heard the paper on ‘‘The Marine Terminal of the 
Grand Trunk Pacific Railway, Prince Rupert, British Columbia,” by Mr. F. E. 
Kirby and Mr. W. T. Donnelly. The paper is now open for discussion. This is 
certainly a most instructive paper, and when one considers that Prince Rupert is 
some five or six hundred miles north of Vancouver, where you would think the ice 
grew all the year around—but it does not—certainly the project is a most remark- 
able one. 
I regret our Honorary Member, Sir William Henry White, who has just re- 
turned from Prince Rupert, is not here. If he were here he could tell us the story 
of the new Pacific road on the project at Prince Rupert, which would be certainly 
very interesting. 
Mr. JoHN REID, Member:—I would like to ask Mr. Donnelly where he puts 
the crane for getting machinery, or parts out of the machinery, which is on the 
dock. I do not see any provision for lifting boilers, or engines, or shafting from 
the ship. 
Mr. Wii11AM T. DONNELLY :—While not referred to in this paper, there is to be 
a 50-ton crane at the head of the pier. It would not be desirable to take the machin- 
ery out of a vessel while in a dry-dock. The removal could be accomplished much 
more easily with the ship lying alongside the pier. 
I should like to make a slight addition to this paper relative to the security 
of the dock against loss by sinking. About the time of the sinking of the dock 
Dewey, I was engaged in determining the actual structural weight of the metal in 
the wings and the amount of buoyancy due to the wooden pontoons when full of 
water. It then developed that the weight of the wings, including the machinery, 
would not be sufficient to overcome the buoyancy of the pontoons when full of 
water; that is, it would be necessary to add ballast of some kind to cause the dock 
as a whole to sink. 
In reviewing this condition in my mind, it occurred to me that it might be 
possible to so arrange the ballast that it might have the opposite effect after the 
