THE EXPERIMENTS OF 1835. 99 



built of this form (as given in Plate III. fig. 1), and was named " The Wave ;" and 

 it is a remarkable fact that, even when deeply laden, and when urged to a velocity 

 of 17 miles an hour, there is no spray, no foam, no surge, no head of water at the 

 prow, but the water is parted smoothly and evenly asunder, and quietly unites 

 after the passage of the vessel, without having changed the natural relations of 

 its particles to one another. Adhesion alone to the suiface of the vessel drags 

 forward a film of adjacent fluid, all else remains quiet and smooth. 



The three other vessels, the Dirleton, the Raith, and the Houston, were built 

 on the models of Mr John Wood of Greenock, a gentleman of much scientific 

 knowledge and great practical skiU ; they are much more neai'ly analogous to the 

 ordinary forms given to sea-going vessels. The Dirleton is the most recent and 

 the best vessel ; the Raith and the Houston are inferior and older. 



It is worthy of remark, that the Wave is the sharpest vessel, the Dirleton 

 next to her, the Raith third, and the Houston the most bluif in the entrance ; 

 that the Wave is fullest, the Dirleton next to her, the Raith next, and the Hous- 

 ton most fine in the run. From the experiments it would seem, that a fine en- 

 trance is of much more importance to velocity than has been hitherto supposed, 

 and that a fine run is by no means entitled to the importance that has been at- 

 tached to it. It should also be observed, that the increase of immersion causes a 

 very great increase of resistance in the three last vessels, and comparatively little 

 in the Wave ; and that the water-lines become blufi" as they descend, but retain 

 the original curve in the Wave. 



Table I. contains the Results of the Experiments of 1835, aiTanged in refe- 

 rence to the Velocity of the Wave of the Fluid, and is deduced from Tables II, 

 III, IV, and V. 



Table II. contains the Original Experiments of 1835 on the Wave, the form 

 of vessel given in Plate III. fig. 1. 



Table III. contains the Original Experiments of 1835 on the Houston. The 

 form of the vessel is given in Plate III. fig. 3. 



Table IV. contains the Original Experiments of 1835 on the Dirleton. The 

 fonn of this A^essel is given in Plate III. fig. 2. 



Table V. contains the Original Experiments of 1835 on the Raith. The 

 form of this vessel is given in Plate III. fig. 4. 



