THE CUBA REVIEW 



IRRIGATION PROBLEMS 



SOME PERTINENT QUESTIONS AS TO PLANT INSTALLATION, 

 AND THE ANSWERS 



Agricultural colleges in the United States constantly receive requests for information 

 regarding installation of irrigation plants, which in the main are worded as follows : 



"I wish to install a pumping plant on my land ; I wish to raise the water twenty feet 

 high ; I want enough water to irrigate eighty acres of land. What size pump shall I 

 order and what horse power engine will be necessary to do the work?" 



The Colorado Experiment Station answered a similar question very fully recently 

 and for the benefit of Cuba Review readers the report is herewith given. 



"The problem," says the report, "brings up immediately two questions, the duty of 

 water and also the efficiency of the pumping plant. It may be safely stated that one 

 second foot of water delivered from a pumping plant will be ample to irrigate eighty 

 acres of ordinary Colorado land and will furnish ample supply of water to raise ordi- 

 nary farm crops upon it. In fact, we should do better than this and should make one 

 second foot of water irrigate and take care of the crops of from 100 to 120 acres of 

 our land. California farmers make one second foot of water irrigate from 300 to 500 

 acres and in time we will do the same, but much money must be spent upon our canals 

 and laterals before this can be done. So, for an ample supply, let us say that one 

 ■second foot will irrigate 80 acres. 



"One second foot of water equals 450 gallons per minute, therefore a pump delivering 

 450 gallons per minute should be purchased. When we come to figure horse povyer 

 necessary to raise this amount of water twenty feet high, we go back to the physics 

 we studied when we were boys. If you will think back over those times, I think you 

 will remember that when one pound is raised one foot high, one 'foot-pound' of work 

 has been done; if that pound is raised 20 feet high, 20 foot-pounds of work have been 

 done. A good sized horse, weighing from 1,400 to 1,600 pounds can do sufficient work 

 to raise a 550-pound weight one foot high each second and keep it up all day and day 



Solo faltan iinos cuantos dias para la 

 operacion de la zafra, pero todavia hay 

 tiempo para hacer uii pedido de las Correas 

 de Transmision ARK Impermeables al Agua 

 al almacen de 



JULIAN AGUILERA& COMPANY, MERCADERES 27, HABANA, CUBA 



donde tienen en existencia esta marca tan conocida, de 

 todos los tamanos, sencillas y de doble capas. 



Las Correas de Transmision ARK, impermeables al 

 agua y al vapor, estan en uso hoy dia en mas de cien 

 ingenios en Cuba. 



Pidan informes a cualquiera que las use respecto a 

 su duracion y economia. 



Fabricadas por la 



PHILADELPHIA BELTING COMPANY '.Z^T^'^'l 



