292 
JOURNAL OF HORTICULTURE AND COTTAGE GARDENER. 
[ Septemb'r 80, 1886. 
of this grand Grape ; those staged by Mr. Pratt and awarded first prize 
were examples of high culture ; the bunches were large, of capital shape, 
while the berries were of good size and most compact, showing that the 
thinning had been done to perfection. Bunches of this variety are often 
thinned far too much ; the consequence is, when the bunches are cut and 
laid down too much stem and berry stalks is visible ; in a really perfect 
bunch none of these should be seen, each berry should fill its allotted 
space and no more. Green samples were the best staged of White Tokay, 
while two pairs only were forthcoming of Golden Queen; at its best it is 
but dirty in appearance, but the flavour of well-grown samples is 
excellent, there is something so firm and crisp in its ta?te. Three lots of 
Trebbiano were staged, but all were poor in quality, the date being too 
early for this variety except under exceptional circumstance?. A seedling 
Grape was shown by Mr. Bannister, Cote House Gardens, Westbury-on- 
Trym, Bristol, the result of a cross between Muscat of Alexandria and 
Black Hamburgh, but it is too much like the Bowosd Muscat to be 
distinct.—A Medallist. 
HEATING BY HOT WATER. 
[Bead before the Members of the Pre3ton and Falwood Floral and Horticultural 
Society, August 7th.] 
( Continued from page 270.) 
The “ Chilwell Nurseries ” b Aler is a horizontal tubular, 
composed of 4-inch cast pipes, see fig. 42. The water passes 
from the return into water boxes at the front and then through 
eight horizontal tubes, four on each side, into other water boxes 
about the centre of the boiler, and then passes out into two tubes 
beyond to another water box. From this the water returns 
through seven tubes to a water box at the front, these tubes being 
directly over the fire. From this position the water again passes 
to the centre of the boiler to another waterbox, and then from 
the boiler into the main flow pipe. In setting, the whole of these 
tubes are incased with firebrick, and then the remaining space 
filled with sand. This boiler does not require a deep stokehole, 
but rather a long one. In the late contest it proved itself to be 
the most economical as regards fuel in the 2000 feet, but, as I 
Fig. 42. 
have said, it was badly stoked, and did not fully display its quafi- 
ties. It is clear that a good flame amongst the tubes, such as 
would be caused by burning “ nuts,” is needed, which would 
heat the boiler much more quickly than coke. The use of coke 
for a boiler constructed on this principle does not bring half the 
tubes in direct contact with the heat thrown off by the fuel. I 
may have observed wrongly on this point, but feel certain that if 
a good blaze had been constantly playing amongst the tubes the 
boiler would have heated the water more rapidly and proved 
itself to have been a quick-heating boiler. 
The boiler Mr. J. Wood entered in the contest was quite 
distinct and perfectly new to me. It is a hoi'izontal tubular, and 
is represented by fig. 43. The fire bars are composed of water 
tubes about 2 inches in diameter, which are connected to a water 
box at the back and front. These tubes are continued round each 
side in the same shape as the ordinary saddle. These are fitted into 
a continuation of the same water boxes as the water bars. Three 
water boxes are continued for afoot or more above the tubes. Three 
tubes run through the centre of the fire, the same length as the rest, 
and are connected to the front and back water spaces. The 
whole of the tubes are surrounded with firebrick to form a flue, 
which allows the fire to play through the tubes and thus exposed 
them to direct action. This boiler is fed at the top and cleaned 
and clinkered at the front. From all appearance this boiler is 
well adapted for burning coke; in fact, all tubulars fed at the 
top work better with this fuel than any other. Mr. Wood’s boiler 
does not contain a large water, space, and the whole being fully 
exposed to the fire, it cannot be long before the water is heated 
and circulation must commence. Many boilers contain too much 
water, and require a good time, and plenty of fuel to heat it before 
it is passed from the boi'er to the pipes. This is a great disadvan¬ 
tage, but the one under notice is constructed on the right principle. 
Fig. 43. 
and proved in the late trials to heat quickly and to raise a high 
temperature in a very short time. 
Coil Boilers. —This form of boilers are not so generally 
known or employed for heating garden and other structures as 
many others of various designs. Mr. Sam Deard’s “Champion 
Coil” boilers are represented by figs. 44 and 45. The first worked 
in 1000 feet contest at Liverpool and gained the highest award, as 
also did the latter in the contest for 500 feet. The boiler consists 
of one continuous coil of pipe, which completely surrounds the 
fire; the larger one, as will be seen, is set upon water bars. The 
durability of these boilers is beyond question, for the coil is 
composed of cast iron segments connected by molten metal, 
which when contracted forms the joint, and is said to bear 100 lbs. 
pressure to the square inch. These boilers when properly set can 
be employed for quick action or equally well for slow combustion. 
Further details on this head, as well as that of the economy of 
Fig. 44. 
these boilers, need not be entered into, for a mere glance at the 
report of the contest will be ample to prove their qualities in 
these respects. The small coil, fig. 45, is constructed on the same 
principle as the larger one, but is set without water bars. The 
method of setting these boilers is illustrated in the engravings, 
and does not require a large amount of brickwork. A narrow 
flue surrounds the coil, which is divided by two or three mid¬ 
feathers according to the size of the boilers. The one at the 
back is constructed to throw the flame round the flue before it is 
allowed to pass up the chimney. Yery little heat can be wasted; 
in fact, none, if the damper in the chimney is properly regulated. 
From the manner in which these boilers worked at Liverpool I 
have formed a very high opinion of them, and do not doubt that 
they will be more largely used by gardeners and others in the 
future than has been the case in the past. Another advantage, 
