135 
THE COTTAGE GARDENER AND COUNTRY GENTLEMAN, December 4, 1860. 
d door, e damper,/fuel, g grate, h ash-pit, ii brickwork,,; and f 
flow and return pipes. 
Fig. 2, outer case of boiler; fig. 3, inner ditto, or firebox; 
fig. 4, general plan; fig. 5, grate ; fig. 6, damper. 
FIG. 4. 
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FIC.5. 
The boiler is of cast iron, quarter inch thick, and formed of 
two pieces, as shown in figs. 2 and 3, bolted together at the 
bottom flanges with quarter-inch bolts (which can be had at the 
ironmongers for 6 d. a-dozen), the joint being made of red and 
white lead on cardboard, and the top joint of the same cement 
and hemp well driven in the V groove where they fit together at 
top. 
The lower part of the chimney forms the entrance to the fire 
and damper, which is formed of stout sheet iron, with a ring 
attached for removal. And here consists the great economy of 
the working, as the damper rests on the top of the firebox, and 
is provided with an aperture for draught, which in the one I 
have in use is one inch and a half by three-eighths of an inch ; 
but, of course, the size of the draught-hole must depend upon 
circumstances. Two or more dampers might be at hand with 
different sized holes for draught. In any case the heat is all, or 
nearly so, given out to the boiler, and but little escapes up the 
chimney ; as was proved by a boiler of this kind being used for 
two years for heating a small greenhouse, and a cork inserted in 
a hole in the chimney at one foot from the fire not being burnt 
in all that time. The grate is such as is usually used for small 
furnaces, with two of the lugs taken off and the other two rounded 
as pivots and supported in the brickwork ; the front being held 
up by a moveable brick, so that the grate can be let fall when 
clearing out the fire at any time. The whole may be enclosed 
in a wood case filled with any non-conducting material, or 
wrapped with felt, as may be convenient. 
I trust I have made the description sufficiently clear to any 
brother amateur who may wish to make one for himself. The 
castings cost me somewhere about 18$. or 19$. I say nothing to 
“ W. P. H.” about pipes, as Mr. Fish’s answer does that better 
than I can. I shall be happy to give any more particulars if 
needed.— James Allen. 
IGAZ AfflA SPLENDENS vebstts eigens. 
Gbeat numbers of gardeners and otli#rs appear to be totally 
unacquainted with the difference between the above two Gazanias. 
Gazania rigens, or, as it used to be called, Gorteria rigens, is not 
such a profuse bloomer as Gazania splendens, seldom having 
more than two crops of blossom in one season. I have known it 
for the last sixteen or seventeen years. I first saw it at Muntliam, 
near Worthing, then the residence of — Fitzgerald, Esq.; and 
Sir. Cordery, the gardener at that time, kindly gave me some 
cuttings of it, and my father still retains some of the original 
stock. I never saw splendens until this last spring. When enter¬ 
ing on my duties at this place in February, I observed in one of 
the late vineries some store pots of Gazanias labelled Gazania 
uniflora, which in foliage it much resembled, but still it looked 
too stiff. I asked one of the young men the colour of its 
blossoms. “ Orange yellow, with a dark belting or ring at the 
base of the petals.” Well, thought I, you are not uniflora, and 
you are not rigens. What and who are you ? Not having seen 
splendens I was in a fix; but having read something the pre¬ 
ceding autumn referring to splendens, I hoped I might have the 
real Simon Pure, which eventually proved to be the case, and it is 
a very different thing to rigens, blooming as freely as uniflora 
with all the beauty of rigens. 
During the time I lived at Rignor Park, I grew the latter, and 
occasionally planted it in the mixed borders, but being such a 
shy bloomer it was not of much service. I believe that many 
have been growing splendens and calling it rigens, and that is 
where the difficulty has arisen.— John Gadd, the Gardens, 
Wilier si eg, Matlock. 
_ MILDEW :;ON GEAPES._ 
Mb. Ashman (at pages 80 and 81) is decidedly wrong in 
ascribing the mildew on his Grapes to syringing. I never had 
the pest on Grapes until this year, and I ascribed it to an ab¬ 
sence of sun and too low temperature. I never syringe my 
Grapes after they are in bloom ; but mildew made its appear¬ 
ance in one email vinery a few days before I came here, in the 
next in May, the next in June, and in the late house in August, 
and it always made itself visible at the coolest end of the house 
first. By a timely application of sulphur to the berries and 
flues, with a high temperature, I so far kept it at bay that little 
damage was done ; but I must acquit the syringe of any blame. 
I believe Mr. Ashman’s to have mildewed from the bunchea 
being near the front windows, and, consequently, much cooler 
than in the more elevated parts of the house. Perhaps they may 
have taken cold some 6unny morning, and a little air given in¬ 
judiciously causing a stagnation. I had given no front air to 
mine, and mildew was observed at the top of the ^ ine first. I 
always have a free circulation of air in the houses without open¬ 
ing the front windows, as the glass is not close glazed, and the 
leaves at the lowest part may be observed to move. 
I have found Grapes shank very much this season, and no 
wonder, with roots at 50° and tops at 60°, 65°, or 70°. I have 
some planted inside in a deep pit formerly used for Pines, with 
a flu* running under it quite free, and Muscats of a rich amber 
