. Bulletin. Agriculture -- Ontario. 18 Side Ventilation.—The eaves of the greenhouse should be built high enough to permit the installation of plenty of ventilators along the side. Particularly where the summer crop of cucumbers is to be grown. This crop, for best results, requires side ventilation as well as ventilation of the ridge. There are various ways of setting those side ventilators and a brief description of each may be of value. The ventilator may take up practically the whole of the glass surface of the side of the house or it may be limited to less. As a general rule too much venti
. Bulletin. Agriculture -- Ontario. 18 Side Ventilation.—The eaves of the greenhouse should be built high enough to permit the installation of plenty of ventilators along the side. Particularly where the summer crop of cucumbers is to be grown. This crop, for best results, requires side ventilation as well as ventilation of the ridge. There are various ways of setting those side ventilators and a brief description of each may be of value. The ventilator may take up practically the whole of the glass surface of the side of the house or it may be limited to less. As a general rule too much ventilation on the side cannot be had. Some growers prefer one continuous run of ventilation, three or six lights in length and two or three lights wide. Others claim to have equal success with about one-half the amount of ventilation given by means of making the ventilators come alternate with equal sized spaces of stationary glass. Side ventilators are used either opening directly beneath the eave plate or opening from a header set right below the eave. Both give satisfaction and both have. Ventilators at the ridge may open from the ridge or from a header. Both ways are good. The majority prefer them to open from ridge. Continuous runs or broken runs as shown are in favor. their advocates. Possibly those preferring the ventilator to be continuous and opening from the header are in the majority. Ridge Ventilation.—This placing of ventilators has been in use since green- houses were built on any scale and they are still a necessity. The ventilators in this case are attached in two ways, namely, from the ridge board or from the header set between the sash bars. In this way the vents open out from the ridge and from the headers or more easily explained opening back to back and away from one another. .From this arrangement we have in the case of one opening from the header the air admitted in one large opening and going straight down into the house and in the case of those opening
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