4d Experiments made at Greenland Dock. [Jan. 



3D. The same as the preceding, except that tlie pointed end of 

 k is foremost : 



Velocity per second, 12 f. Motive weight, 307*55 Ihs. 

 40. The same as the preceding, except that the body k has now 

 two pointed ends, and the iron bars are 9 feet 9 inches asunder: 

 Velocity per second, 12f. Motive weight, 269'41 lbs. 

 '41. Parallelopidedon, p, with the same parallelopipedon, ft, 

 immersed, lengthened l)y an additional wedge, w, at each extremit}^ 

 (fig. 3). Length of wedge at the foremost end, 3'(j058 feet. Length 

 of tiie oblique side, 3657 feet. Length of the wedge at the 

 }\indmost part, 2*3606 feet. Length of the oblique side, 2-438 

 inches : 



Velocity per second, 12 f. Motive weight, 293*75 lbs. 



42. The same as the preceding, but the other end of the im- 

 mersed body foremost : 



Velocity per second, 12 f. Motive weight, 285*51 lbs. 



43. The parallelopipedon, p, wiih the iron bars alone, the 

 immersed body being removed : 



Velocity per second, 12 f. Motive weight, 1 73*57 'bs. 



44. Parallelopipedon, p, with a smooth pointed deal plank 

 attached to the iron bars, its centre being immersed 6 feet. The 

 foremost end of the deal plank was formed into the shape of an 

 equilateral triangle. Length of plank, 20-020S feet. Depth, 1 

 foot. Thickness, 3 inches. Area of the surface, 52*552 feet: 



Velocity per second, 12 f. Motive weight, 226*28 lbs. 



45. The same as the preceding, 1*0208 foot of the plank being 

 left attached to the foremost bar, the rest removed : 



Velocity per second, 12 f. Motive weight, 204*34 lbs. 



in. Bodies Immersed at different Depths. 



46. The parallelopipedon, p, lengthened by the addition of an 

 equilateral triangle at its foremost extremity. To its aftermost 

 extremity was fixed a round iron bar, sustaining a square iron 

 plane, containing 2971 8 superficial feet, and the centre of the 

 plane was immersed 3 feet (fig. 4) : 



Velocity per second, 12 f. Motive weight, 665*68 lbs. 



47. The same as the preceding, but the centre of the plane was 

 immersed 6 feet : 



Velocity per second, 12 f. Motive weight, 722*90 lbs. 



48. Same as the preceding, but the centre of the plane was 

 immersed 9 feet : 



Velocity per second, 12 f. Motive weight, 786-68 lbs. 



49. The same, wanting the plane. The bottom of tlie round 

 iron bar immersed, 2*3905 feet : 



Velocity per second, 12 f. Motive weight, 179-56 IbJ. 



50. The same as the preceding, the bottom of the iron bar being 

 immersed 5*3905 feet : 



Velocity per second, 12 f. Motive weighty 223*96 lbs. 



