. r )10 
THE GREEN-HOUSE, HOT-HOUSE, AND STOVE. 
small boiler communicating with the tank or 
with larger pipes, by means of a small leaden 
pipe, which will be found to heat a very large 
body of water, the cold returning by another 
pipe, and thus keeping up the circulation, 
•which, although apparently slow, is rapid 
enough for all purposes. But we should not 
lie afraid to try the stove alone for a small 
conservatory. They are highly ornamental 
and well worth attention, as, indeed, are all 
improvements on any given useful novelty. 
The combustion can be regulated to anything 
according to the quantity of air admitted and 
draught created, by the opening or closing of a 
valve. Upon the whole, therefore, Nettleton's 
Patent Stove, for a small conservatory or green- 
house, will be found ornamental as well as use- 
ful ; and if applied in the manner we have 
mentioned to heat water, may be made highly 
effective for propagating or forcing-houses on 
a small scale. The Chunk stoves, said, by Mr. 
Wilmot of Isleworth, to be effective, are ugly 
and troublesome ; and twenty other things 
have been recommended that are anything 
but inviting. The best of them was Arnott's, 
but it was ugly and not powerful ; and in 
Nettleton's we have a thing more effective 
and far more handsome. 
TROPiEOLUM EDULE AND PEREGRINUM. 
In a former notice of this genus, mention 
was made of many that were in common 
cultivation among persons who professed to 
Tropmolum edule. 
grow anything like a collection of plants ; and, 
as a matter of curiosity, perhaps few genera 
afford a greater contrast in respect to the 
form, colour, and habit of growth. Those we 
mentioned were selected for their difference 
from each other ; and since that notice was 
written, we have obtained the drawings of two 
other species or varieties. T. edule is a 
vigorously growing variety, already fully de- 
scribed ; but T. peregrinum is more curious 
than beautiful. It has been imported under 
other names. T. canadensis, for instance, so 
Tropaiolum peregrinum. 
called, proved to be the same thing when 
raised from imported seeds, and, strange to 
say, exhibited, in a very few plants, hardly 
two which bore flowers of the same size ; and, 
though all were of the same fringy or notched 
character, some were more handsome than 
others. It is not, however, much of a favourite 
among the choice selections, on account of its 
weedy appearance. Nor is it a good one to 
use for the purpose of hybridizing. The 
notched or serrated, or fringed petals, would 
certainly not improve any other of the kinds 
by crossing ; nor is it the best yellow. By 
crossing some of the smooth-edged, highly 
coloured varieties with others of good habit, 
something out of the ordinary way would, 
perhaps, reward the operator, but this is so 
much a matter of taste, that to direct would 
be idle. 
THE 
HOT-HOUSE, 
AND 
GREEN-HOUSE, 
STOVE. 
If these three horticultural buildings were 
of importance when their existence was con- 
fined to the establishments of the wealthy, 
how much more so are they now that the reduc- 
tion of glass to almost a nominal price places 
them within the reach of nearly every amateur 
gardener ! The devotion of a volume to the 
instruction of those who could command them 
under the old and exclusive system was a 
work of no small courage, but, now that every - 
* The Green-house, Hot-house, and Stove. By Charles 
M'Intosh,F.H.S. London : W. S. Orr and Co. Ainen- 
corner. 
