‘JULY. 197 
ap anopins : but to these items of expense we will allude more 
fully next month, In the meantime, however, let us look at the 
advantages to be gained by haying a Peach wall covered with glass 
compared with a wall under the system of culture in ordinary use. 
If the most is to be made of the glass covering, it is evident that it 
should slope from the wall at an angle of about 45°, and that.space 
for ventilation should be-lefttop, and bottom.; On this account, the 
glass.need not be nearer the soil of the border.than. 20,or 24. inches, 
and about the same distance should, be left between it and the coping of 
the wall. This will permit the glass to be.a fixture, so far as ventila- 
tion is concerned; and would afford accommodation for a double set. of 
trees underneath, one against the back wall, and the other.on a, circular 
trellis springing from. the front plate, and carried to within. four feet.of 
the back wall, but kept down, so as not to obstruct the light from the 
back wall, higher than 2 ft. Gin. from the. floor, Considering, that, the 
lower part of the wall would not be altogether without its uses, the gain 
would be about two-thirds more, as regards. training surface, which 
might be greatly increased by running up a vertical trellis to the glass 
every 12 or 15 feet, on which trees are found to thrive remarkably well. 
We find therefore that a wall 100 feet long, covered with glass, will 
anid nearly, if not quite, double the surface for training. which an 
ordinary, wall gives. We must. next carry our calculations, a. little 
farther, to see what other, advantages are gained by placing a. glass 
covering over the trees. 
~ We have stated above that a full crop of fruit is not obtained by the 
out-door system oftener than seven or eight years out of the Ld, which 
we gave as the ayerage period of duration in which the Peach continues 
in a profitable condition. , Now, with the protection of glass, taking the 
same time (three years) for. the tree. to. become, sufficiently large to 
carry a moderate crop, we may fairly calculate that the duration of the 
trees, so protected will be much, increased ; and taking the duration 
of the Peach in houses where it is not much forced. for a ouldes 
we shall not be far out if we add eight or ten years to the average of 
trees grown upon open walls, increasing it to 23 or 25 years, instead 
of fifteen, as the period me may expect the Peach. to continue. pro- 
ductive. So much for the, duration of the Peach, under, glass. We 
may also consider that after the third year, a full, crop each year may 
be relied on if ordinary care, is taken) of the trees, as to training and 
ripening their, wood, .. Respecting this latter, one great difficulty in 
ripening the wood of wall Peaches in wet autumns will be removed; for 
as the greater part of the roots of the trees will be covered with glass, 
wet can be excluded from the border at pleasure, and after the fruit has 
done swelling, no water need be permitted to touch it. By withholding 
water, the border will soon become dry, and this will check the growth 
of the summer’s shoots, and induce that early and complete maturation 
of the wood, on which the certainty of the ensuing year’s crop mainly 
depends, other conditions being favourable. 
We attach no importance to what we have heard, but not experienced 
ourselyes—that the crop of Peaches has been destroyed in orchard 
houses by the frost having killed the bloom. This may have occurred ; 
