. The Cuba review. THE CUBA REVIEW 29 PLANTATION CARS TuE'^k^T.^^kt^^l. No. 1001 (Palabre de clave ZOMHA) Fabricanios vagones de todas clases y tamanos para usarse en Ingenios, Lineas Auxiliarcs y Servicios Analogos; asi como piezas sueltas para estos vagones. Escriban pidiendo informes sobre Vagones para Cana, Vagones Ciibiertos, Vagones Platafornias, (convertibles en vagones para cana> Vagones para Comestibles, Vagones Basculares, Vagones Cisternas, Vagones para Contratislas, Vagones para Ganado, etc. Nuestros niodelos y construccion representan el mejor producto Americano. AMERICAN CAR &
. The Cuba review. THE CUBA REVIEW 29 PLANTATION CARS TuE'^k^T.^^kt^^l. No. 1001 (Palabre de clave ZOMHA) Fabricanios vagones de todas clases y tamanos para usarse en Ingenios, Lineas Auxiliarcs y Servicios Analogos; asi como piezas sueltas para estos vagones. Escriban pidiendo informes sobre Vagones para Cana, Vagones Ciibiertos, Vagones Platafornias, (convertibles en vagones para cana> Vagones para Comestibles, Vagones Basculares, Vagones Cisternas, Vagones para Contratislas, Vagones para Ganado, etc. Nuestros niodelos y construccion representan el mejor producto Americano. AMERICAN CAR & FOUNDRY CO., NEW YORK, Direccion telegri'ifica :—Xallim, New York. Los niayorcs fabricaniex de vagones para ferrn-carriles del miindo. after day, consequently we have a unit for the rate of doing work which is called the 'horse-power,' and it is equal to 550 foot-pounds per second. Our engines are all rated in horse power. When one cubic foot of water, or 450 gallons, is delivered each second, the weight of this water is Gr^Va pounds. If this is raised 20 feet high, we should be doing 20 times 621/2 or 1,250 foot-pounds of work each second. Dividing this by 550, we have (nearly). This is the theoretical horse-power required to raise one second- foot of water twenty feet high. Our machinery, however, is not perfect, for there is work lost in friction, friction of the water in the pipe and also in the turns and elbows, hence it will take more than a horse-power engine to do the work desired. The efficiency of an ordinary plant will not usually run more than 50 per cent, perhaps 40 per cent would be a better figure, so the horse-power represents just 40 per cent of the power necessary, or the sized engine to order would be 100 times one-fortieth of , which is practically 6 horse-power. "Another thing that every farmer should remember, and that is, when water is forced through a pipe, the faster it travels the greater the loss in friction. This los
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