98 
ON THE VINERY. 
derable expence may be faved, as, in that cafe, a low wall in- 
front will anfwer equally as well. The ll:iade of this wall 
would be very injurious to the border, if the Vines were to be 
forced early in the fpring ; but the meridian altitude of the 
fun, in the beginning of fummer, renders it no way prejudi- 
cial at that feafon. 
Suppofing a flued wall, twelve feet high, the breadth of the 
border ten feet, and the height of the upright glafs T'ame, or 
wall, in front, three feet, the roof will then form an angle of 
about forty-three degrees. Experience flaews this to be a pro- 
per pitch for Vines forced after the vernal equinox. I mention 
this circumflance, becaufe fome perfons, who give defigns for 
buildings of this kind, lay fo great a ftrefs on this point, as to 
pronounce a Vinery, or Peach-houfe, incapable of anfwering 
the intended purpofe, Ihould the pitch of the roof happen only 
to vary a degree or two from their favourite angle. Indeed, if 
w'’e fuppofe the fun’s meridian altitude always the fame, fuch an 
objediion would reft on a folid foundation ; but we know that it 
not only varies daily, but many degrees in a ftiort fpace of time b 
fo that if the pitch of the roof depended on fo nice a point, 
what 
® At London, latitude 51. 30. N. in the fummer folflice, (June 22) the meri- 
dian altitude, or fun’s place above the Horizon at noon-day, is 63^ degrees. — 
But at the winter’s folftice, (December 22) it is only i&^ Degrees above the 
Horizon. 
