action of;
  pitch of the screw;
  screws of increasing or expanding pitch;
  slip of the screw;
  positive and negative slip;
  screw and paddles compared;
  test of the dynamometer;
  trials of “Rattler” and “Alecto,” and “Niger” and “Basilisk”;
  indicator and dynamometer power;
  loss of power in screw vessels in head winds;
  the screw should be deeply immersed;
  screws of the Earl of Dundonald, Hodgson, Griffith, Holm, and Beattie;
  lateral and retrogressive slip;
  sterns of screw vessels should be sharp;
  proportions of screws with two, four, and six blades;
  screw vessels with auxiliary power;
  screw and paddles combined;
  economy of fuel in steam vessels;
  benefits of registration. 
Screw propeller, Holm’s conchoidal. 
Screw shaft, details of. 
Screw shaft pipe at stern. 
Screw shaft brasses of direct acting screw engines. 
Sea water, amount of salt in. 
Sea injection cocks. 
Setting of wagon boilers,
  of marine boilers. 
Setting the valves of locomotives. 
Shaft, paddle, details of. 
Shaft of screw propeller, details of. 
Shafts, strength of. 
Shank’s steam gauge. 
Shocks may not be well resisted by iron that can well resist strains,
  effect of inertia in resisting shocks. 
Side levers or beams, description of. 
Side lever marine engines, description of. 
Side lever engines, how to erect. 
Side rods, description of,
  strength proper for. 
Silsbee, Mynderse & Co.’s steam fire engine. 
Single acting engines, definition of. 
Single acting or pumping engines,
  mode of erecting;
  mode of starting. 
Sinuous motion of locomotives. 
Slide valve,
  various forms of;
  long D and three ported valve, description of;
  action of the slide valve;
  lead and lap of the valve;
  rules for determining the proportions of valves;
  advantages of lead in swift moving engines. 
Slide valve, equilibrium. 
Slide valve with balance piston of direct acting screw engine. 
Slide valve, how to finish. 
Slide valves of marine engines, how to set. 
Slip of paddle wheels. 
Slip of the screw,
  positive and negative slip;
  lateral and retrogressive slip. 
Smoke, modes of consuming. 
Smoke burning furnaces,
  Williams’s argand;
  Prideaux’s;
  Boulton and Watt’s dead plate;
  revolving grate;
  Juckes’s;
  Maudslay’s;
  Hall’s, Coupland’s, Godson’s, Robinson’s, Stevens’s, Hazeldine’s, &c. 
    “Snake” locomotive. 
Southern,
  experiments on friction by;
  experiments on steam by. 
Specific heat, definition of. 
Speed of vessels influenced by their size. 
Spheroidal condition of water in boilers. 
Springs of locomotives. 
Stand pipe for low pressure boilers. 
Starting handle of locomotives. 
Staying of boilers. 
Staying tube plates, mode of.