102 
ON THE CIRCULAR SAW MILL. 
For Aquatic Plants. —Fig. 12, shews a mode of warming a cis¬ 
tern or reservoir of water for the preservation of Aquatic Plants, as 
erected at Mr. Miller’s Nursery, at Clifton, in front of one of the green¬ 
houses, and having a glass roof. Steam is admitted by a pipe three 
12 
quarters of an inch diameter, having perforations of about one tenth 
of an inch at each foot in length, the extremity of the pipe being 
closed, and it issues through the small apertures, filling the whole 
internal area of the large pipe in which it is enclosed, imparting an 
equable temperature to the whole extent of surface ; an effect which 
cannot be obtained by applying steam in the common way, when but 
a small increase of temperature is required ; as the water immediately 
in contact with the pipe where the steam is admitted would absorb 
nearly the whole of its heat, till it arrived at a temperature far be¬ 
yond what could he allowed in a case of this kind. The dimensions 
of the reservoir alluded to, are about three feet by three feet six in¬ 
ches, and twenty feet long. The external pipe four inches inside 
diameter, the condensed water from which is taken away by a small 
syphon at the further end. 
RURAL AFFAIRS. 
Article VII.—ON THE CIRCULAR SAW. 
BY MR. E. MURPHY. 
(Given in Answer to our Correspondent in the Irish Farmers* and Gardeners ’ Magazine»J 
I perceive that I am called upon, by a Correspondent, (Vol. 3, p. 
488,) lor an account of the Circular Saw-Mill, which I observed at 
Dunkeld, and with the construction of which I professed myself so 
much pleased the object of the enquirer being to have a circular 
saw erected in the farm-yard. 
Perhaps the most likely way to meet his wishes, will be to des¬ 
cribe the machinery of a very complete circular saw-mill, which I 
had lately an opportunity of observing, at Glenmore, in the county 
of Wicklow, the property of — Synge, Esq. 
The Water-wheel by which the whole is worked, is thirteen feet 
in diameter, by three feet in width; —the water enters the buckets 
