1 
72 GREENHOUSE CONSTRUCTION AND HEATING. 
especially for syringing, etc., as containing no mineral 
matters, it leaves no deposit or discolouration of the 
foliage. Again, where there are no gutters, the water 
‘from the roof is shot directly on the ground, rendering 
the soil sodden and soft in times of heavy rain, and 
often causing the foundations to become rotten and give 
way, and in the, case of vineries rendering the borders 
sodden and sour. 
The ordinary half-round guttering, about din. diameter, 
is usually employed for greenhouse work, and is fixed 
either by means of common brackets, or if there are piers 
built at intervals outside the wall, the gutter may be 
conveniently bedded on these. For houses built with side 
A B glass and two plates, 
y, the gutters must, of 
course, be fixed to 
\ the upper one, and 
Fic. 58. in this case, the ogee 
or O.G. pattern is most suitable, as being at once more 
easily fixed (with long screws), and affording a neater 
appearance. 
Low span-roofed houses built with a ‘‘drip” board 
along the eaves are easily provided with gutters by nailing 
@ small neat batten at right angles to the drip, along its 
lower edge, as described on p. 58. 
Gutters between two or more span-roofs, constructed 
contiguously (as in Fig. 5), should be wide enough for a 
man to walk along easily, that is to say, 7in. or 8in. in the 
clear, or more if convenient. Such gutters may be con- 
structed in either of the ways shown at a, and B in Fig. 
58, and should either have a good coat, or two, of tar 
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