PAGE

Something may be faid in Extenuation of Dr.

BROWN'S overbearing and fretful Behaviour, 138

Dr. BROWN's private Conduct cannot however
exculpate his learned Oppofers, and form an
Excufe for the illiberal Treatment he almoft
univerfally met with,

A Note, to prove that fordid, envious, and prejudiced Oppo-
fition will not, in the prefent Day, prevent the Establish-
ment of USEFUL TRUTHS.

The well-inftructed of the FACULTY have no Reason to
fear that this philosophic Appeal to the Common Sense of
Mankind will prejudice their Intereft,

ib.

ib.

SECT. II. LAW I. A DUE EXCITEMENT IS

NECESSARY FOR THE MAIN-

TENANCE OF HEALTH AND

VIGOUR,

-

139

In the Universe every Thing is in Motion,

ib.

The Grandeur of this Conception illustrated

by fuppofing all things in a State of Reft, 140

-

The

The MOVEMENTS of the internal Organs of

the Body are many of them inceffant,

PAGE

-

140

ALL MOVEMENTS in the Body arise from the

RETROCESSION of the Fibre from CERTAIN

STIMULI,

- ib.

In the MIDDLE PERIOD OF LIFE the IRRI-

TABILITY of the Fibre is much diminished, ib.

In OLD AGE the IRRITABILITY is deficient, 141

The EXCITEMENT fhould be adapted to the

State of the irritable Fibre,

ib.

A DUE EXCITEMENT is neceffary to HEALTH:

too much, or too little, lays the Foundation

for DISEASE,

ib..

The new Do&trine was at first misunderstood, and in some

States of Difeafe improperly applied, -

ib.

The Handle the Enemies of JOHN BROWN made of

this,

ib.

The Study of THE LAWS OF ORGANIC LIFE will finally

become a Part of polite Education,

ib.

PAGE

SECT. III. OF EXTREME HEAT.

{

The Stimulus of HEAT is neceffary for the

Growth and Vigour of Animals,

-

142

A Note, to fhew that the IRRITABLE PRINCIPLE is
dependant on a due Degree of HEAT,

The debilitating Effects of EXTREME HEAT il-
luftrated by Obfervations on Man, Ani-
mals, and Plants, -

FAHRENHEIT'S Experiments, which prove the
deftructive Powers of EXTREME Heat,

-

Meffrs. Du HAMEL and TILLET are fent to

Angoumois to recover the damaged Corn in

that Province,

They heat an Oven at Rochefoucault, with

the Intent of deftroying the Infects which

infefted the Corn, without hurting, if pos-

fible, the living Principle in the Seed,

They are puzzled to affertain the exact De-

gree of HEAT in the Oven, when a Girl,

fmiling at M. TILLET'S Fears, entered the

Oven, though the HEAT was at 260 De-

of FAHRENHEIT'S Thermometer,

grees

{She continued there thirteen Minutes,

ib.

ib.

143

144

ib.

145

ib.

ib.

Monf. MURANTIN's Experiment with another

Girl belonging to the fame Oven, who

breathed an Air heated to 325 Degrees for

the Space of five Minutes,

8

146

Thefe

{

3d. Trial in a Room heated to 224 De-

grees,

-

148

The DEBILITATING EFFECTS which arose

from this laft Experiment,

Drs. FORDYCE and BLAGDEN's Experiments,

in which the Body was exposed almost

naked,

-

1ft. Trial, and Effects, as obferved by

Dr. FORDYCE,

ib.

ib.

149

2d. Trial, and debilitating Effects, as ob-

ferved by Dr. Blagden, --

In a Note. The Reafon why fresh Acceffions of HEAT

cannot raise BOILING WATER above 212 Degrees of

the Thermometer,

The Quantity of HEAT that is carried off by the Process of

EVAPORATION,

An Excefs of Heat in the Body is removed

in a great Measure by an increase of PER-

SPIRATION

TION,

and confequent EVAPORA-

150

ib.

The Faintnefs of the Body from EXTREME

HEAT is extended alfo to the MIND,

An Account of the putrefcent Qualities of the
AIR in the hot Climate of the BRASILS,

PAGE

151

ib.

{

In a Note. The antiputrefcent Quality of cold Air.

The remarkable Prefervation of eight Englishmen on the

Coaft of GREENLAND,

152

Of the dreadful Effects arifing from the Cli-

mate of SENEGAL in Africa, and CARTHA-

GENA in America,

SECT. IV. OF MODERATE HEAT AND EX-

TREME COLD.

{Of a mild Atmosphere,

153

154

{The beneficial Effects of MODERATE COLD, ib.

The Influence of CLIMATE on the Character

and Conftitution,

155

1. The fuperiority of thofe who inhabit
the TEMPERATE REGIONS of the Earth, ib.

2. The Inferiority of those who live un-

der the TORRID Zone,

3. And near the POLE, -

{The Effects of EXTREME COLD,

SECT. V. ON LIGHT.

Of the Compofition of LIGHT, and its Separa

tion by Sir ISAAC NEWTON into feven

Rays,

156

157

158

159

From