Staying fire boxes of locomotives. 
Steam, experiments on by Southern, French Academy, Franklin Institute,
    and M. Regnault. 
Steam pump,
  Worthington’s;
  Woodward’s. 
Steam and water, relative bulks of. 
Steam,
  expansion of;
  pressure of;
  inversely as space occupied;
  See also Expansion of Steam. 
Steam engine, applications and appliances of the. 
Steam engine,
  general description of Watt’s double acting engine;
  R. Hoe & Co.’s;
  Corliss’s;
  Woodruff & Beach’s. 
Steam engine,
  various forms of, for propelling vessels;
  paddle engines and screw engines;
  principal varieties of paddle engines;
  different kinds of paddle wheels;
  the side lever engine;
  description of the side lever engine;
  oscillating paddle engine;
  description of feathering paddle wheels;
  direct acting screw engine. 
Steam dome of locomotives. 
Steam fire engine,
  Latta’s. 
  Amoskeag. 
  Silsbee, Mynderse & Co.’s. 
Steam gauge,
  Bourdon’s;
  Shank’s. 
Steam jacket, benefits of;
Steam passages, area of;
Steam room in boilers;
Steam, surcharged, law of expansion by heat;
Steel, strength of;
Stephenson, link motion by;
Stop valves between boilers;
Straight edges;
Strains subsisting in machines;
Strain proper to be put upon iron in engines;
Strains in machines,
  vary inversely as the velocity of the part to which the strain is
applied.
  aggravated by being intermittent.
  increase of strain due to deflection.
  effects of alternate strains in opposite directions. 
Strength of materials. 
Strength of hollow pillars,
  law of;
  strength varies with thickness of metal. 
Strength of cast iron to resist shocks does not vary as the strength
    to resist strains,
  increase of strength by combination with cast iron. 
Strength of boilers,
  experiments on, by Franklin Institute;
  by Mr. Fairbairn;
  mode of computing;
  mode of staying for strength. 
Strength of engines:  cylinder,
  trunnions;
  piston rod;
  main links;
  connecting rod;
  studs of the beam;
  gudgeons;
  working beam;
  cast iron shaft;
  malleable iron shaft;
  teeth of wheels;
  side rods;
  crank;
  crank pin;
  cross head;
  main centre;
  gibs and cutter. 
Studs, strength proper for. 
Stuffing box, description of. 
Stuffing boxes with metallic packing,
  with sheet brass packed behind with hemp;
  sometimes fitted with a lantern, brass. 
Sugar mills, power necessary to work. 
Summers’ experiments on the friction of rough surfaces. 
Surcharged steam, law of expansion of, by heat. 
Surcharged steam produced by salt water,
  corrosive action of. 
Surfaces, how to make true. 
Sweeping the tubes of boilers clean of soot.