A Guide to the Scientific Knowledge of Things Familiar
PART I.
HEAT.
INTRODUCTION.
Q. _What is heat?_
A. The sensation of warmth.
Q. _How is this sensation produced?_
A. When we touch a substance of higher temperature than ourselves, the warmer substance keeps parting with its heat, till both are of equal temperature.
Q. _What is that "stream of heat" called, which flows thus, from one body, to another?_
A. CALO'RIC. _Caloric_, therefore, is the _matter of heat_, which passes from body to body; but HEAT is the _sensation, of warmth_, produced by the influx of Calo'ric.
Q. _What are the four principal_ SOURCES _of heat_?
A. 1.--The Sun. 2.--Electricity. 3.--Chemical Action: and 4.--Mechanical Action.
Q. _What are the principal_ EFFECTS _of heat_?
A. Expansion, Liquefaction, Vaporization, and Ignition.