. The American florist : a weekly journal for the trade. Floriculture; Florists. igo2. The American Florist. 247. MEMBERS OF THE CANADIAN HORTICULTURAL ASSOCIATION, AT HAMILTON, ONT., SEPTEMBER 3 TO 5, 1902. during a bad drought? These questions and many others must all be carefully considered before work is commenced. There are two modern systems for heating greenhouses, namely, steam and hot water. In the writer's opinion the former sj'stem is undesirable compared with the latter, except for very large installations involving many houses heated from a central boiler plant with fireman in con
. The American florist : a weekly journal for the trade. Floriculture; Florists. igo2. The American Florist. 247. MEMBERS OF THE CANADIAN HORTICULTURAL ASSOCIATION, AT HAMILTON, ONT., SEPTEMBER 3 TO 5, 1902. during a bad drought? These questions and many others must all be carefully considered before work is commenced. There are two modern systems for heating greenhouses, namely, steam and hot water. In the writer's opinion the former sj'stem is undesirable compared with the latter, except for very large installations involving many houses heated from a central boiler plant with fireman in constant attendance on the boilers. But for small and moderately large greenhouse installations the hot water system is very much to be pre- ferred for the following reasons. 1st.—Greenhouse men who have tried both systems are almost unanimous in agreeing that better and quicker plant development is possible with the hot water than the steam system, and this is just what we would naturally expect when considering the low temperature of the hot water pipes in comparison with the roasting heat of the steam pipes. The hot water system undoubtedly produces a milder quality of heat. 2nd.—The attention required for a modern hot water boiler in all but zero weather, and with a properly designed system, should not represent more than three visits to the boiler room per day, whereas a steam boiler of the old hori- zontal return tube type practically requires constant hourly attention, not only for stoking but to keep an eye on the water level, and so forth. A modern water tube steam boiler fitted with auto- matic damper regulator, and so forth, should receive attention at least every three or four hours. 3rd.—Should the fire be allowed to die out in a steam system all heat would vanish at once from the greenhouse pipes. Under similar circumstances the hot water system could retain sufficient heat in the circulating water to give the operator time to start a fresh fire before much dam
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