FOOTNOTES:
[18] The preceding paragraphs, and some other parts of the present volume on the general properties of Heat, are taken from my Treatise on Heat, in the Cabinet Cyclopœdia, to which those who desire more detailed explanation and more copious illustration should refer.
GLASGOW COLLEGE.
[CHAP. V.]
WATT FINDS THAT CONDENSATION IN THE CYLINDER IS INCOMPATIBLE WITH A DUE ECONOMY OF FUEL.—CONCEIVES THE NOTION OF CONDENSING OUT OF THE CYLINDER.—DISCOVERS SEPARATE CONDENSATION.—INVENTS THE AIR-PUMP.—SUBSTITUTES STEAM PRESSURE FOR ATMOSPHERIC PRESSURE.—INVENTS THE STEAM CASE, OR JACKET.—HIS FIRST EXPERIMENTS TO REALISE THESE INVENTIONS.—HIS EXPERIMENTAL APPARATUS.—DIFFICULTIES OF BRINGING THE IMPROVED ENGINES INTO USE.—WATT PRACTISES AS A CIVIL ENGINEER.—HIS PARTNERSHIP WITH ROEBUCK.—HIS FIRST PATENT.—DESCRIPTION OF HIS SINGLE-ACTING STEAM ENGINE.