1870. ] 
VINES AND VINE-CTLTrUE—CHATTER XVr. 
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sensitive, and require great care in ventila¬ 
tion, to prevent a too rapid rise of temperature, 
and consequent scorching of the vines. 
We add on p. uS a figure of what is generally 
termed a three-quarters span or hipped roof 
SrAN-Boorrp VjNEBy,—S ection. 
Span-roofed Vinery,—Plan. 
vinery. It is a combination of the lean-to and 
span-roof, and unites to a great degree the ad¬ 
vantages of both styles. For general purposes 
there is no better form of vinery than this, and 
it admits of easy and thorough ventilation by 
the short lights at the back, without in 
any way interfering with the front roof 
of the house. The vines in a house of 
this sort are planted as recommended for 
the lean-to vinery, and the best aspect is 
as nearly due south as possible. For 
muscat grapes requiring a considerable 
amount of firing, a high temperature, and 
plenty of sun-light, the three-quarters span 
is greatly to be recommended, as it is also 
for late-keeping grapes. 
We also give a representation of a span- 
roofed vineiy, so called from the roof 
forming a span or arch. This style of 
structure has become extremely popular 
since the days of cheap hothouses. It is 
the most elegant and ornamental, espe¬ 
cially in isolated positions. There is no 
other form of vinery nearly so pretty, or 
one which affords so much roof-space for 
the development of the Vines. For the 
general cultivation of Grapes, the span- 
roofed vinery answers extremely well. The 
whole being glass, the amount of air and 
light admitted is very great, and this is 
decidedly beneficial to the vines, at cer¬ 
tain seasons. The disadvantages are that, 
having so large a glazed or cooling surface 
exposed, it is much more difficult to main¬ 
tain a high or regular temperature in a 
house of this form. On this account, span- 
roofed houses are not well adapted for 
early forcing, or even for keeping grapes 
very late. 
In regard to position or aspect, the rule 
for span-roofed houses is the reverse of 
that recommended for the other forms of 
house. The best and greatest results are 
here obtained by placing the ridge due 
north and south, the one side thus facing 
east, and receiving the benefit of the morn¬ 
ing sun, whilst the other is due west, and 
receives in like manner the afternoon sun, 
the direct or mid-day sun striking some¬ 
what obliquely on both sides. Thus both 
sides receive about an equal amount and a 
