of Edinburgh, Session 1878 - 79 . 75 
Various suggestions have occurred to me since these experiments 
were made for further improving the system, which I may shortly 
mention. 
1. As to the stove-room, it ought to he lined in the inner portion 
with some radiating metal or non-conducting substance, and he 
divided into two parts, one containing the bodies of the stoves or 
pipes, the other for firing, &c., a doorway being left between the 
two for the admission of such amount of air as required. And 
further, as the quick removal of the heat given off from the metal 
of the stoves or pipes is of importance, it is proposed to introduce a 
fan in the inner division to he worked from the outer, and to admit 
as small a portion of cold air as may be practicable for carrying off 
the heat into the hall or church. 
From the result of these experiments I have come to the conclu- 
sion that for warming and ventilating buildings a stove-room is 
required, hut the best mode of raising heat therein is an open 
question. 
For large buildings I believe steam-pipes placed in the chamber 
would be the cheapest, the boiler being either in the chamber or 
outside. The heat would be greater than from hot water, but this 
latter would answer very well, and, perhaps, on the whole, would he 
preferable, the amount of heat being regulated by the extent of 
pipes ; and it cannot fail to occur to every one that the result ob- 
tained from the above experiments of the effect of accumulated heat 
discharged into a building in the manner described would in all 
respects he preferable to the present system of pipes distributed in 
the building itself. It is a mistake to introduce heat into a church 
or hall by dispersing it in pipes covered with gratings ; the waste of 
heat must be very great, while, if the same amount were accumulated 
in a chamber, and sent on, as described above, it will he distributed 
in a way so perfectly suitable to what is required, as to cause wonder 
that so valuable a property of heat had not long ago been known. 
Ventilation. 
The stove-chamber is itself an efficient means for the introduction 
of fresh moderately warm air, by simply opening the outer door and 
allowing the air to pass over the heated stoves or pipes, aided, if 
required, by using the fan. But the more important matter still 
