142 DATA ON HOG AND SAG OF MERCHANT VESSELS. 



No. I starboard and No. 4 port holds were filled with water to the second deck 

 with the pipe column to the upper deck 8 feet above. Measurements were taken be- 

 fore, during and after tests at ten stations on the starboard side, spaced approxi- 

 mately 10 feet each, starting 10 feet forward of forward bulkhead No. 112 of hold 

 No. I and extending 30 feet aft of after bulkhead No. 106 of hold No. 4, the dis- 

 tance between forward bulkhead of No. i hold and after bulkhead of No. 4 hold 

 being 50 feet. With the exception of the three forward stations which were in 

 the way of the planked-over portion of the building ways, a stake 3 inches square 

 by 30 inches long was driven flush with the ground and a tack driven flush in the 

 head of the stake and on the planking on the ways. A corresponding center punch 

 mark was made on the hull above ; the height at these points or stations was care- 

 fully measured with the results herein noted. 



Provision for carrying the extra weight during the test was made by fitting 

 (in the way of tested compartments) additional keel blocks adjacent to the regular 

 ones ; also additional shores between the regular shores. Extra cribbing was also 

 provided under bottom between keel blocks and bilge shores. 



The total bearing of keel blocks, shores and extra cribbing amounted to ap- 

 proximately 480 square feet. The weight of the ship for 50 feet at 12 tons per 

 foot was estimated at 600 tons. The weight of water in No. i and No. 4 holds was 

 estimated at 743 tons, this making a total of 1,343 tons, or a bearing pressure of 

 2.8 tons per square foot. 



In checking the measurements during the test, with tanks filled, the following 

 deflection was observed at the various stations (starting forward) under the dates 

 noted : — 



Dec. 29, 1914 Jan. 4, igis 



Station No. i ^' yi" 



Station No. 2 yi" Yi," 



Station No. 3 Yz ^" 



Station No. 4 ^s" H" 



Station No. 5 ^/ A] 



Station No. 6 3^" ^" 



Station No. 7 ^/ ^' 



Station No. 8 Ys" H" 



Station No. 9 tV" ^" 



Station No. 10 ^" ^" 



Check measurements were taken January 14, 191 5, at the various stations after 

 tanks were emptied, which showed the ship to have settled from the original meas- 

 urements taken December 21, 19 14, before tanks were filled, as follows: — 



