760 



SUCCESSFUL FARMING 



volt systems would operate at a less cost for such equipment. In most 

 cases these systems receive their power from small gasoline engines; how- 

 ever, it is becoming popular in mountainous regions to use small streams 

 to furnish motive power. Where water is used, the storage battery is not 

 necessary, because water forces through the wheel at a steady rate which 

 will in turn produce a steady light. This is not true of a small gasoline 

 engine, although some companies are making very sensitive engine gov- 

 ernors and heavy flywheels which are calculated to run very smoothly. 

 Heating. — There are three distinct heating systems from one central 



plant, namely: hot air, 

 hot water and steam. 

 These systems are used 

 mostly in extremely 

 cold countries. 



1. The hot-air sys- 

 tem, if properly in- 

 stalled, gives the best 

 ventilation, and in most 

 cases is the cheapest of 

 the three. In cold, 

 windy weather this sys- 

 tem is rather hard to 

 control on account of 

 the leeward side of the 

 house receiving the 

 greater part of the heat. 



2. The hot-water 

 heating system is the 

 most expensive to in- 

 stall on account of two 

 systems of piping, one 

 for feed, the other for 

 return. It has been 



found that the Honeywell generator or the Mercury-Seal system causes 

 the hot water to flow more rapidly than without, thus increasing the 

 efficiency of the system. 



3. Steam heat is entirely satisfactory. It gives quicker heat, but does 

 not retain its heat as long as the hot-water system. 



Ventilation. — There are two influences which cause ventilation, 

 namely: (1) the force of the wind, which causes more or less suction from 

 any opening in a building; (2) the difference in outside and inside tempera- 

 tures, the warm air inside rising and escaping through any opening, thus 

 causing ventilation. The "King system" is generally used in farm 

 buildings at the present time. It consists in admitting fresh air near the 



1 Courtesy of Louden Machinery Company, Fairfield, la. 



Modified King System of Ventilation. 1 



