CONSTRUCTION OF GREENHOUSES 
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186. The boiler. — The boiler should be of ample capac- 
ity to maintain proper temperatures; forcing a boiler 
means a waste of fuel, and the boiler itself will not last 
so long. There are several types of boilers on the 
market. The most important point to consider in select- 
ing a boiler is to see that the construction is of such a 
type that the greatest heat will be realized from the fuel 
consumed. The flames should strike the sections of the 
boiler at right angles, and the connection with the smoke 
pipe should not be too direct. Sectional and tubular 
boilers are in most common use in greenhouse heating. 
187. The work room. — In every greenhouse establish- 
ment there is a great deal of work to be done in the way 
of seed sowing, transplanting, potting and preparing 
crops for market. Nothing is more important than a 
commodious room where all the work can be done in 
perfect comfort. This room should be well lighted and 
properly heated and ventilated. Tables of the right 
height are necessary, and a small room for tools will be 
found very convenient. 
