Produced by deaurider, Brian Wilcox and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) Transcriber’s Notes: The spelling, punctuation and hyphenation are as the original except for apparent typographical errors, which have been corrected. Italic text is denoted _thus_. Bold text is denoted =thus=. Bold, sans serif text, representing physical appearance e.g., of a ‘Vee’ shaped thread is denoted thus ^V^. Subscripts are denoted thus _{1}. Some page numbers printed in the original ‘Index to Part One’ do not appear in the body of the book . The transcriber has endeavoured to make assumptions as to the most appropriate anchor locations. The appearance of the original index has not been changed. Examples (possibly relocated, by the author, into Part Two) are: =Air=, des., composition of, 15, 16 =Air pump=, 13 =Nitrogen=, what part of air, 15 =Oxygen=, what part of air, 15 =Value of Reidler belt-driven pump=, ills. and des., 238-240 changed in the Index to:- =Valve of Riedler belt-driven pump=, ills. and des., 238-240 All references to ‘Reidler’ pumps have been corrected to ‘Riedler’ (Alois Riedler, 1850-1936, Austrian professor of engineering). PUMPS AND HYDRAULICS. IN TWO PARTS. Part One. “_There are many fingers pointing to the value of a training in science, as the one thing needful to make the man, who shall rise above his fellows._”—FRANK ALLEN. [Illustration: Elephant] “_The motto marked upon our foreheads, written upon our door-posts, channeled in the earth, and wafted upon the waves is and must be, ‘Labour is honorable and Idleness is dishonorable.’_”—CARLYLE. This work is respectfully dedicated to MAJ. ABRAM B. GARNER, of Newark, N. J., —AND— ALBERTO H. CAFFEE, ESQ., of New York City. ‘Gentlemen without fear and without reproach.’ [Illustration: _Henry R. Worthington_] “_Thought is the principal factor in all mechanical work; the mechanical effort is an incident rather than the principal equipment in any trade or occupation._” “_Any trade is easily learned by an apt scholar who uses his reasoning faculties and makes a study of cause and effect._”—CHAS. J. MASON. PUMPS —AND— HYDRAULICS —BY— WILLIAM ROGERS _Author of “Drawing and Design,” etc._ [Illustration] _RELATING TO_ HAND PUMPS; POWER PUMPS; PARTS OF PUMPS; ELECTRICALLY DRIVEN PUMPS; STEAM PUMPS, SINGLE, DUPLEX AND COMPOUND; PUMPING ENGINES, HIGH DUTY AND TRIPLE EXPANSION; THE STEAM FIRE ENGINE; UNDERWRITERS’ PUMPS; MINING PUMPS; AIR AND VACUUM PUMPS; COMPRESSORS; CENTRIFUGAL AND ROTARY PUMPS; THE PULSOMETER; JET PUMPS AND THE INJECTOR; UTILITIES AND ACCESSORIES; VALVE SETTING; MANAGEMENT; CALCULATIONS, RULES AND TABLES. _WITH ILLUSTRATIONS._ _ALSO_