226 THE PROBLEM OF THE HULL AND ITS SCREW PROPELLER. 
made than the former, as the type seems to depend very considerably on the ratio of 
draught to beam. 
Generally speaking, the majority of vessels whose ratio of draught to beam is 
equal to or greater than the standard given on Plate 71 for types 1 and 2 vessels are of 
type 2, those from a little below the standard given for type 3 up to the standard given 
for types 1 and 2 are of type 1, while type 3 range from the standard given for type 3 
and below it. 
In submitting the results of my years of labor to the members of this Society I 
wish to express to the Society my appreciation of the many kind words which have 
been spoken to me concerning my work and to assure the members that the pleasure I ex- 
perience on hearing them adds greatly to the pleasure I have found in prosecuting the 
investigation, a task which, while work of the hardest kind, has been of the most intense 
interest. 
THE CHAIRMAN:—When I was young, about all we knew concerning propellers 
was that their ways were very peculiar. Admiral Dyson has become an inter- 
national authority on these peculiarities and has illustrated them to an extent that 
sometimes it has seemed doubtful if it were really possible to do—the actual performance 
of propellers, and the application of this actual performance to the matter of design in 
a way that no other authorities, as far as I am aware, have succeeded in doing. 
Before we adjourn, I wish to say that the Society thanks Admiral Dyson for his 
very elaborate paper, which has involved an immense amount of research, as is appar- 
ent to all who read it. 
I want again to announce for the benefit of those not here this morning that there 
will be an excursion to the Federal Shipbuilding Company, at Kearney, N. J., to- 
morrow. ‘The steamer leaves the Pennsylvania Railroad Pier at Cortlandt Street at 
nine o’clock sharp. Tickets may be obtained at Room 604. 
I think we may congratulate the Society that in this meeting we have had most 
interesting sets of discussions on the various papers presented that have been placed 
before the Society, and I have no doubt that the members will have great pleasure 
when they receive their printed proceedings in reading over these discussions with the 
added points that may be made through written communications. 
The session now stands adjourned. 
