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, U.S.A. 



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 2.3 (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 2.3 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 2.3 horse-power represents just 40 per cent of 

 the power necessary, or the sized engine to order would be 100 times one-fortieth of 

 2.3, 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 loss is equiva- 

 lent to increasing the pumping head, hence it is better to use large pipes instead of 

 small ones: it is also best to have as few turns or elbows as possible and it is simply a 

 question which must be decided for each individual plant as to what sized pipe will be 

 the most economical. The larger the pipe the more it costs, and yet with a large pipe 

 the engine mav be smaller and less fuel required to pump the required amount of water. 



"Irrigation by pumping is growing all over the country. We have now hundreds of 

 pumping plants where we had none a few years ago. It has its advantages and its 

 disadvantages, it usuallv costs more than gravity irrigation, but it is available at any 

 time and is a paying proposition on many of our farms. India irrigates over 3,000,000 

 acres from wells, and the time will come when America will surpass this." — E. B. House, 

 Colorado E.xperiment Station, Fort Collins, Colo. 



All estates in Cuba have finished work, 

 and harvesting of the old crop has ended. 

 The final outturn, as reported by Guma- 

 Mejer, is given as 1,895,984 tons, an in- 

 crease of approximately 85,000 tons. 



Prospects of the new Cuban crop are 

 gratifying. Favorable weather has pre- 

 vailed, enabling planters and cultivators to 

 make very extensive plantings for the 

 1912-13 crop. 



