THE COTTAGE GARDENER AND COUNTRY GENTLEMAN’S COMPANION, June 23, 1857. 389 
Hot-water Column for heating Con¬ 
servatories, Halls, &c. They are made 
of various sizes, from 4 feet to 7 feet 
high, and contain from 40 to 00 square 
feet of heating surface. 
Hot-water Coil for heating Conservatories, Halls, &c. Made of 
various lengths and heights, from 2 feet to 12 feet long. 
Ornamental Coil Case to cover hot-water coils. Made of all sizes 
and of various designs, for Conservatories, Halls, <fcc. 
The leading rule for the construction of all boilers is to 
obtain the greatest amount of surface exposed to the fire 
without increasing the cost of the boiler so much as to be 
not compensated by the fuel saved and the rapidity of heat¬ 
ing gained. We think the saddle boiler obtains this much- 
desired result. It must also be remembered that a simple- 
formed wrought-iron boiler is easily repaired. 
Gaeden Wateeing and Rolling Engine. —Made by Mr. 
J. Dove, 17, Exmouth Street, Clerkenwell. 
The advantages of this neat little Garden Machine may 
be seen in not only throwing water a distance of about sixty 
feet, but of watering and rolling grass or gravel walks at 
the same time, so that while two wheels would in either 
case be injurious, this, roller absolutely does good, and is so 
portable that any ordinary domestic may use it. 
Moneo’s Cannon Boiler. 
This is the invention of Mr. J. Monro, gardener to Mrs. 
Oddie, Colney House, near St. Alban’s. He describes it as 
a horizontal, cylindrical, wrought-iron boiler, with tubular 
supports and pedestals, combining the advantages of the 
cylindrical, tubular, and saddle-back boiler. Mr. Monro has 
now sold all interest in his invention to Mr. Jones, Iron 
Merchant, Bankside. This, also, seems to attain the objects 
to be aimed at in the construction of a boiler. It exposes a 
very large surface to the fire, and is not expensive. 
{To be continued.') 
