HISTORY OF MARINE ARCHITECTURE.

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The bodies, of which the different forms are annexed, were drawn through thewater by the same motive weight, that is to say 1 lb. and £, and the ensuing obser-*vations given in the words of Mr. Gore himself, were made in the course of theexperiments. Fig. 1 exceeded fig. 2 in its velocity, reckoning by feet and decimalparts per second, .053, each of them weighing 25 lb. 40Z. fig. 3, though weighing28 lb. 8 oz. exceeded fig. 1 by 277. fig. 4 being similar in form to fig. 3, with theaddition only of a little fullness forward, as seen in the plate, (which increased itsweight to 291b. 40Z.) suffered in velocity only 106. which is supposed tobe counter-balanced by the power of the additional canvass which this augmentation wouldenable the ship to carry. Fig. 5 has a further addition forward, as appears by theplate, and its weight is thereby increased to 301b. 8oz. yet it loses in its velocity only.051, by the last increase, though it still exceeds considerably fig. 1 and 2, notwith-standing an addition of 51b. 8oz. is made to the weight. Fig. 6 is similar tofig. 5, with the addition only of a sharp beak forward, as per plate, which,though the weight becomes thereby increased to 321b. 8qz. brings the velocityequal to fig. 3, within ,076, notwithstanding the considerable increase bothin capacity, and stiffness. Here it is to be observed, that the extreme breadthis abaft the centre. Fig. 7 is similar to fig.. 2, except that the line in theafter part of the ship is hollow, instead of round, which reduces the weight to28IU 8oz. being ilb., 8oz. less than fig. 2, and thereby causes the velocity toexceed that of fig. 2, by ,n i, which is supposed unequal to the defalcation ofcapacity, and consequently of stability. It is also certain, that this form wouldbe subjedl to more oscillation in a sea, on account of the great inequality in thetwo ends, by which the essential counterpoise is destroyed, and it followstherefore, that the velocity must be diminished, as it cannot be doubted but thatthe vessel which is nearest balanced in the sea will oscillate or pitch less, andmust, consequently, cteteris paribus , be capable of greater velocity.

Fig. 8, which is fig. 7 reversed, x. e. the sharp end foremost, loses thereby,030. It is observable also, that this figure, being similar to figure 1, with thevariation only of the line in the fore part being hollow instead of round, gainsin velociry, compared to fig. 1, ,028; therefore this increase of velocity seemsto be produced rather by the decrease of weight than by the variation of form.Fig. 9 is fig. 4 reversed, by which the velocity is increased ,056. This demon-strates* that fullness abaft, even to a degree obvious to a critical eye on inspectionof the plate, does not impede the motion through the water. Fig. 10 is fig. 5 re-versed, by which the velocity is diminished ,096. Here the fullness abaft appears