HOUSES FOR CARXATIOX GROWING 217 



The combined "Z" bar eaves plate and drip gutter, 

 as shown on page 220, is proportioned to shed the rain clear 

 of the superstructure, and the drip gutters forming part of 

 the eave materially strengthens this part of the building 

 and completely overcomes all the objectionable sagging 

 features so well known to growers of the galvanized gutter 

 that is attached by strips to the glazing bars, or the wood 

 gutters which are used in some constructions. 



Ventilating is done at the sides by a Hne of transom 

 or shding sashes operated by two gears placed in the center 

 of the house. This method of side ventilation reduces to 

 a minimum the possibihty of excessive draughts on the plants, 

 and also reduces the labor of manipulation to a minimum, 

 and whilst the labor question is of vital importance and 

 is one of the chief elements in favor of the larger houses, 

 growers must more or less be guided by common sense and 

 experience. Long runs of roof ventilating have been 

 tried, and from the construction point of view are an 

 unquahfied success, but there is a general tendency on the 

 part of some of the best growers to recede to the medium 

 length of run operated by the worm gear. For large houses 

 a run of 50 ft. to 72 ft. lift, operated by one gear, will be 

 found to be the most practical and the safest. 



The gables are so braced as to withstand the shock of 

 the severest storm. These are furnished with double slid- 

 ing doors where necessary to allow of teams being used in 

 the fining and emptying of the houses. These ''general 

 utility " houses, to which this appellation can well be 

 applied, can be used equally for Sweet Peas or Roses, 

 provided the necessary heating arrangements are adequate 

 to maintain the required temperature. 



For growers of limited capital the semi-iron con- 

 struction up to 35 ft. wide is not so expensive as the iron 



