38f, Notices respecting New Books. 
is, to get an equal distribution of heat.. In a room, on a eold, 
winter’s day, when the thermometer in the shade stood at 28, L 
had as good a fire as the Bath stove, or grate of the room, would: 
enable ne to have; I then took a thermometer, and placed it 
in different parts of the room—in all the corners of the room: 
where it was not under the direct influence of the fire, it stood at 
4 degrees; I then brought it into the direct rays of the fire, 
and carried it to within a few inches of the bars, when I found it 
rise to 159, From this experiment we see to what a great range 
of temperature we are exposed, when we imagine ourselves so 
situated as to be free from the influence of the external air: on: 
the contrary, in my study, there is not a variation of 5 degrees. 
in any part of the room, except when. you approach very near to 
the aperture at which the warm air enters. A still greater advan- 
tage of warming a study with heated air is, that the intolerable 
quantity of dust arising from an open fire may be avoided, and 
papers and books, which would otherwise be covered an “inch 
thick with dust, remain for weeks as clean as at the time they 
were placed in order. 
“ But as we have strong prejudices to overcome, the Madeira. 
House has fire-places in the: rooms ; the air which the fire will 
consume only adds to the greater quantity of warm air which is 
brought into them by the supplying tubes. 
“ In addition to the apartments with regulated temperature, 
the different suites of baths are so conveniently placed, that the 
occupier of these rooms will be enabled to have the use of them 
without being exposed to the vicissitudes of the atmosphere: thus 
(except in the great scheme, in which it was proposed to have 
attempted promenades and circuses) the inhabitant of the 'Ma- 
deira House will possess all the useful means of regaining lost 
health.” 
The instrument which Dr. Kentish has invented for ascer- 
taining the soundness of the lungs is described in an appendix, 
The author takes for granted that a healthy man with a well 
formed chest is able to throw out and take in at one inspiration 
between eight and nine pints of air. The breathing capacity of 
individuals of consumptive or asthmatic habits varies from one 
pint to four or five. We give the doctor’s description of the 
instrument itself: 
“‘] have at different times used a variety of means to arrive 
at a knowledge of the breathing capacity of the lungs, in all dif- 
ferent_states of the subject, when in health or in 1 disease, A 
bladder with a pipe attached to it will serve this purpose. If 
a person blows into a bladder, when he has drawn in as much 
air as his lungs will hold, and only makes one expiration, he 
may measure the quantity of air expired, by passing it under a 
receiver 
