1811.] Experiments made at Greenland Dock. 49 



Depth, / c, 1 foot. Depth, x c, '^ inches. Bar, 8 inches Lroad, 2 

 inches thick : 



Velocity per second, 12 f. Motive weight, 109"31 Ihs. 

 7S. Same as tlie last, witli a plank fixed at the bottom of the 

 broad bar, 14 feet long, 1 foot 8 inches deep, and 3 inches thick 

 (fig. I'i, plate xvi.) : 



Velocity per second, 12 f. Motive weight, 170*50 lbs. 



79. Same as the last, but the plank reduced in length to 2 feet: 

 Velocity per second, 12 f. Motive weight, 1 '18*24' lbs. 



80. Same as before, but the body, A O (fig. 13), instead of tlie 

 plank. Centre of this body iiniuerbcd G feet, x A = * feet, r o ~ 

 4 feet 6 inches, x r ■=■ 1 foot : 



Velocity per second, 12 f. Motive weight, 14242 lbs. 



81. Same as the last, but tlje length of r o (fig. 13) reduced to 

 3 feet : 



Velocity per second, 12 f. Motive weight, 14254 lbs. 



82. Same as the last, but the sides r o (Hg. IS) converted into 

 segments of a circle of 8 feet radius: 



Velocity per second, 12 f. Motive weight, 14248 lbs. 



83. Same as the last, but the hinder part of A O (fig. 13) con- 

 verted into a semi-ellipse : 



Velocity j)er second, 12 f. Motive weight, 144*22 lbs. 



84. Same as in exper. 81, but the length of r o reduced to 2 

 feet : 



Velocity per second, 12 f. Motive weight, 145*04 ll)s. 



85. Same as the last, but the length of r o (fig. 13) reduced to 

 1 foot G inches : 



Velocity per second, 12 f. Motive weight, 149*20 lbs. 

 SG. Same as the last, but the length of r o (fig. 13) reduced to 

 1 foot : 



Velocity per second, 12 f. Motive weight, 1G6*41 lbs. 



87. Same as the la.-t, but ro (fig. 13) converted into segments of 

 circles of 1 foot radius : 



Velocity per second, 12 f. Motive weight, 155*29 lbs. 



88. Same as the last, but the hinder part of the immersed body 

 converted into a semicylinder of 6 inches radius (fig. 14) : 



Velocity j)er second, 12 f. Motive weight, 152*12 lbs. 



89. San)e as the last, but the lihider part of the immersed body 

 wanting, it terminates at r r (fig. 13) : 



Velocity per second, 12 f. Motive weight, 15793 lbs. 



90. Same as in exper. 82, but the end of the immersed body 

 formed of segments of circles foremost : 



Velocity per second, 12 f. Motive weiglit, 141*62 lbs. 



91. Same as in exper. 83, but the semi-cllij>tical end of the 

 immersed body foremost : 



Velocity per second, 12 f. Motive weight, 142 1!)S. 



92. Same as in exper. 84, but the shortest end of the immersed 

 body foremost : 



\'el(>citv per second, 12 f. Motive weight, 142*66 lbs. 

 Vol. lll.'N" I. D 



