INDEX TO VOLUME /. 



477 



STEAM-ENGINE GOVERNOR. 



50 ; efficiency of Watt condensing, 

 : (cj-pantive, 24 ; condensation, 

 .ts not shewn in diagrams of, 

 ;> t ; condensing, example of, and 

 unlimited horse-power of, 87 ; 

 whi'ii theoretically perfect, but 

 impracticable, 3f>) ; first suggests! 

 use of, 50 ; high pressure, loss in, 

 4 ; low-pressure condensing, dia- 

 gram of, 35 ; power of, depends 

 on, 29 ; principle of, laid down by 

 Watt, 50 ; ( Watt's, 50 ; improve- 

 ments, recent, of, 51 ; organic 

 parts of, viz., furnace, boiler, 

 cylinder, and condenser, 51). 



Steam-engine governor. See Go- 

 vernor. 



Steam jacket, G9 ; advantage of, 69 ; 

 condensation in cylinder prevented 

 by, 72; cylinder, sides and end 

 require, 69, 138 ; Watt's engine 

 supplied with, 72. 



Steam jet, 141 ; air delivery by, 

 dependent on surface contact 

 between air and steam, 143, 154 ; 

 air delivery in inverse ratio to 

 weight of air acted on, 143 ; air 

 pressure, limit of, attainable with 

 given pressure of steam, 143 ; 

 elastic force changed into onward 

 motion in, 153 ; investigations re- 

 garding, by Rankine, 144, and 

 Zeuner, 144 ; parts, judicious ar- 

 rangement of, 141 ; principle of 

 action of, 143 ; simplicity of, 141. 



Steam jet, Siemens's, 142 ; air de- 

 livered proportionate to surface 

 contact in, 154 ; annular jet of 

 steam in, 142, 143, 156 ; applica- 

 tions of (to evaporation of sugar, 

 150 ; costly apparatus saved by, 

 use of, in, 151 ; description of ar- 

 rangement of, 151 ; successful 

 experiments with, 152) ; (to Gas- 

 Producers, 152 ; advantages of, 

 153 ; description of, 152) ; (to 

 Pneumatic Dispatch Tubes, 146 ; 



SUPERHEATED STEAM. 



description of, 147 ; intercepting 

 apparatus for, 147, 148); (to 

 raining water, 148; apparatus, 

 description and action of, 149 ; lift 

 attainable with, 150 ; preliminary 

 results with, 150) ; compression 

 or exhaustion proportionate to 

 steam pressure in, 143, 154 ; con- 

 clusions derived from experiments 

 with, 143 ; delivery tube in, para- 

 bolic curve, best form of, 143, 155 ; 

 description of, 142 ; details of, 

 considered, 156 ; exhauster exhi- 

 bited in action, 155 ; (experiments 

 with as blower, 146 ; as exhauster, 

 145) ; rationale of, 142 ; steam 

 orifice, increase of area of, with 

 increase of compression or vacuum, 

 157 ; and Zeuner's apparatus com- 

 pared, 144, 145. 



Steam steering engine, 124 ; auxili- 

 ary propulsion, useful for, 124 ; 

 submarine telegraph ships, impor- 

 tant for, 125. 



Steel boilers. See Boilers. 



Steel melting. See Regenerative gas 

 furnace. 



Steel, mild, application to boilers, 

 170 ; homogeneity of, 171 ; punch- 

 ing plates of, 172 ; tearing of, 171 ; 

 yielding property of, 170. 



Stirling, regenerator or respirator, 

 invention of, 57. 



Stirling's engine. Sec Air engine, 

 Stirling's. 



Straw, analysis of, 169 ; ash in, 169 ; 

 heating power of, 169 ; water in, 

 169. 



Ste.-Claire Deville, dissociation, re- 

 ference to, 204. 



Submarine telegraph ships, difficulty 

 of manoeuvring, 125 ; steam steer- 

 ing apparatus for, 125. 



Sugar, evaporation of. See Steam- 

 jet, Siemens's. 



Superheated steam. See Steam, super- 

 heated. 



