upon an area ot 15,000 square leet. it -pKis „^ rt of the building was completed early in
mmmmmm ^ 6 ^ 2 . Ample eentilation is provided by movoWo sashes which are opened and shut simultaneously iu by the visiters, who are thus enabled to pass te and Ire m any airecuon
etom either side or^ a t any particular p a rt of hou e s heated
PUBLIC GARDENS FOR INSTRUCTION.
r
the rest and in the arrangements for heating provision was made te maintain m this compartment i
temperature sufficient for the growth of tropical plants ; and a selection of such kinds as possess mteresi
either for their botanical, economical, or medicinal properties, has been made.
A The roller extending the entire length of the building. _
B, Tlie chain used for causing the rolier to revolve by turmng
the windlass handle, E. , ■ r
C Thocordsattachedtotheslidingsashes, D. By the action ol
tlie roller lu the direction of the arrow, u will be obvious
that the sasbes will be drawn up in consequence ot one
of the cords being attached to the lop of the roller and
the other at the bottonu To open the sashes hy letting
them down, it is merely necessary to unwind the wnty-
lass, when the sashes will descend by their own weight.
62.54. Proceeding from the conservatory eastward, tbere is a collection of indigenous plants (A) under
cultivation, and arranged according to the classes and orders of Linnæus, as an
system. A little farther on, but in connection with the last,is the medical m which the p ante
are disposed in natural orders. The collection contains 450 species. ..Southwards from here
the general collection of herbaceous plants (*), also arranged accordmg to tlieir naturffi affimtms, and
here there are about 2700 species. The trees and shrubs, amounting te 1267 species
prising the arboretum, are also arranged according to their natural aflimties, and are distributed around
th e g a r d e n . T h e co lle c tio n u n d e r glass, in 18.50, con sisted o f 1720 sp ecies. i
6255. S*V/.TO«//iwiarrt from th o g e n c r a lc u lle c tio n o f h a rd y perennials,is ab o rd e r(i)m whicharecultivated