Morey on Heat and Light. 3 131 
I add some of the advantages, (as they appear to me) 
which will and do result from obtaining light and heat by 
the decomposition of water, instead of forming permanent 
as. 
1. We are not troubled with that disagreeable smell, 
which accompanies carburetted hydrogen gas, unless care- 
fully purified. 
2. We obtain all the light, necessary for ordinary purpo- 
ses, from the same combustibles, which are used for warm- 
mg the apartment. 
3. A stove supplied in this way requires less fuel for 
warming an apartment, than is demanded in any other mode 
with which I am acquainted, and less to warm and light the 
room at the same time, than to warm it only. 
4, The apparatus for furnishing this light is very cheap: 
so simple that any person can manage it: so light and por- 
table, that it may be placed on a table or on the mantlepiece, 
or carried about the house nearly as conveniently as a lamp 
and as the temperature need not be so high as a red heat, 
thin sheet iron must last a good while. 
5. The whole heat, evolved during the combustion, is 
retained in the room, without rendering the air unpleasant 
or unhealthy. Better judges, however, will decide as to the 
latter. : 
6. The heat on ever so large a scale, will be nearly per- 
fectly uniform. Stoves in my house, made of brick on this 
principle, (the wood however is put in at the side) burn 
from nine o’clock at night uatil nine, ten, and eleven the next 
day: keeping the room entirely warm, during the coldest 
nights of the winter past.* 
Much however is yet to be learned in the small way. 
_ Different kinds of the fat wood, containing more or less wa- 
ter, require different degrees of heat to evaporate them so 
as to burn without smoke; so also with common tar, con- 
taining more or less water. ‘The vapour, at first, always 
commences burning with a beautiful blue flame, or nearly 
blue, trimmed with a bright white. So it is with rosin, min- 
eral coal, birch-bark, and pumpkin seeds. It becomes dif- 
ficult in some measure, after about two thirds of the volatile 
* The climate of Orford is severe—thermometer in the winter oceasion- 
ally from 2\.° to 30° of Fah. below 0. Mr. Morey does not state how it 
has been were during the late cold winter—£d. 
