and horse powers, and work out the constants by the two systems, we have at 14 knots the Admiralty constant for the City of Rome 322.2, and for the Normandie 304.8; and taking for a modified form of constant, the City of Rome gives 253.7 and the Normandie 251.9, which, as will be seen, are much closer together.  Similarly, at 15 knots the Admiralty constant for the City of Rome is 310, and for the Normandie 295.2, while a modified constant comes out for the former at 245, and for the latter 244, again agreeing almost identically.  The same at 16 knots, for the City of Rome the Admiralty constant comes out 297.6, and for the Normandie 282.8, while a modified constant comes out for the two ships 234.4 and 233.7 respectively, again showing marked agreement.  It may be mentioned that in these two ships the engines are of a similar type, being three-crank tandem engines, and the propellers have in both pitch and surface practically the same proportions to the power and speed.  The value of these modified constants will probably be found to increase as the speeds increase up to the limit and beyond that point at which wave resistance becomes an important factor.

TABLE III

----------------+--------+---------+---------+-------+-

------------+
Name.       |Length. | Breadth.| Moulded |Midship|Displacement.|
|        |         | draught.| area. |             |
|        |         |         |       |             |
|        |         |         |       |             |
|        |         |         |       |             |
----------------+--------+---------+---------+-------+------

-------+
|ft. in. | ft. in. | ft. in. |       |             |
|        |         |         |       |             |
City of Rome    | 542  6 | 52   0  | 21  51/2  | 1031  |   11,230    |
|        |         |         |       |             |
|        |         |         |       |             |
Normandie       | 459  4 | 49  11  | 19  93/4  |  892  |    7,975    |
|        |         |         |       |             |
Furnessia       | 445  0 | 44   6  | 22  21/2  |  893  |    8,578    |
|        |         |         |       |             |
|        |         |         |       |             |
Arizona         | 450  0 | 45   11/2 | 18  9   |  758  |    6,415    |
|        |         |         |       |             |
|        |         |         |       |             |
Orient          | 445  0 | 46   0  | 21  41/2  |  904  |    7,770    |
|        |         |         |       |             |
|        |         |         |       |             |
Stirling Castle | 420  0 | 50   0  | 22  3   |  990  |    7,600    |
|        |         |         |       |             |
|        |         |         |       |             |
Elbe            | 420  0 | 44   9  | 20  0   |  807  |    6,350    |
|        |         |         |       |             |
Pembroke Castle | 400  0 | 42   0  | 17  0   |  648  |    5,130    |
|        |         |         |       |             |