From the Baltimore American.
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The experiment of the transportation or tzvo hundred ba1yels of flour, with 8iHSfe horse. was made on the Rail Road on oatur- day with the most triumphant success The flour was deposited in a train Of eight cars, and made together with the cars and the pas sengers who rode on them, an entire load of thirty tons, viz: 200 barrels of flour, 20 tons; 8 cars, tons; Passengers, tons; making in all 80 tons. The train was drawn by one horse from Elcotts' Mills to the relay-housc, six and half miles, in fofty-six minutes.-

 The horse was then changed, and the tram having again set out, reached the Depot on Pratt street in siXty-ninc minutes; thus ac- complishing the thirteen miles in one hour and ffty-fye minutes, or at.the rate of six and three fourths of mile in an hour. The road between the relay-house and the Depot IS

 wac. .tl, o. th~ea dren eXCa- twenty y-fect per mile has been resorted to fol the purpose of drainage. The horse, except at the points just alluded to, brought the train along at a moderate trot, and apparently with out any extraordinary labor; he is not remark able, and was not selected for any peculiar power of draft, and had performed a regular trip outwards on the morning of Saturday, A numerous concoursc of citizens and stran- gers witnessed the arrival of the train at the Depot, and although they looked for the ac- Complshment of the experiment as matter of course, many of them were, nevertheless, unable to refain from loudly testifying their admiration at the case and celerity with which it was effected It is, we believe, only about week ago that we noticed the fact of the transportation of seventy-fve barrels of flour, by one horse, as a circumstance worthy of re- mark in comparison with the number of horses required for the conveyance of a load of few barrels over turnpike road. The experiment which we have detailed abuve shows, that on Saturday single horse drew three times as large aload; and there is no doubt that horses could be found who could with the same case transport a load of three hundred barrels. And if such results as these can be accomplished by the power of single horse, who will undertake to calculate the Ca pacity of our Rail Road, either for heavy transportation or great rapidity, or both com bned, when locomotive engines of the most improved construction constitute the moving power?