298 



On the Rapid Production of Steam 



THIRD SERIES, 



With cylinders of cast iron of different weights, and at different tern 

 peratures; water at 212°. The surface exposed in each expen 

 ment, is indicated in a separate column. 



c 



V 



» 





v -■ 



at C 





G 



o 



K 



. 



O - 



_ © 



e ku 



2 



£^ 



O 





o 



u 



<3 





1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



o 



s 



c 

 O 



3 



a 



g « 



G 



- 



N 



O 





i 



15 



16 



17 



IS 



19 



20 



21 



22 



23 



24 



25 



26 



27 



28 



29 



30 



31 



32 



33 



34 



60 

 168 

 152 



60 



168 



152 



60 



60 



168 



168 



60 



60 



60 



61 



168 

 168 



30 

 60 

 80 

 50 

 90 

 135 

 55 

 55 

 105 

 106 

 60 

 55 

 55 



90 



300 

 300 



61 105 



61 



61 



105 

 120 



152 300 

 152 300 



152 

 60 



152 

 61 

 61 



168 

 60 



300 



70 



300 

 90 



120 



180 



2.25 



6.75 



7 



3.375 

 14.25 

 13.75 



5.5 



5.5 

 15.5 

 16 



6.5 



6.75 

 6.75 



7 



19.5 



19.5 

 7.25 

 7.5 

 7.5 



19 



19 



19 

 7.75 



21 

 8 

 8.5 



23.5 





2 





■ 



3 



o 



V 





/. 



c 



3 



O 



.0375 



.0401 



.0460 

 .0562 

 .0848 

 .0904 

 .0916 

 .0916 

 1 .0922 

 .0952 

 . 1 083 

 .1125 

 .1125 



.1147 



.1160 

 .1160 

 .1185 

 . 1 229 

 .1229 

 .1250 



.1250 

 .1250 

 .1291 

 .1316 



26.666 

 24.888 

 21.714 

 16.000 



a 



3 

 00 



1 



a 





HEAT OBSERVED. 



REMARKS 



37.69 



86.25 

 77.47 

 37.69 



ll.789j86.25 

 11.054 77.47 



10.909 

 10.909 



i 



37.69 



37.69 





10.838 86.25 



10.50086.25 



9.23037.69 



8.888 37.69 



8.888 ! 37.69 



8.714 



8.618 

 8.618 

 8.413 

 8.133 

 8.133 

 8.000 



37.69 



86.25 

 86.25 

 37.69 

 37.69 

 37.69 

 77.47 



8.000,77.47 

 8.000 

 7.741 

 7.23 



6 



75 8.5 



151 300 22 





61 

 152 



60 

 152 



120 



180 

 105 



270 



I52I360I34 



9 



29 



11.5 



32.75 



77.47 

 7.69 



77.47 

 7. 625 1 37. 69 

 7.176 37.69 



8 



7.149 

 7.058 

 6.864 

 6.727 

 5.241 

 >217 



86.25 

 37.69 

 77.47 

 37.69 

 77.47 

 37.69 



Black. 



Do. 



l>o. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Low red in the dark. 



Do. 



Do. 

 C Comparable, (dull 

 I red in day light) 



Do. 



Do. 

 I Do. 



Do. 



Do. 



Do. 

 Do. 



Do. 



Brighter red. 



Clear red. 



Do. 



Do. 



Full red. 



Do. 



Do. 



Immersed at once. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



do. 

 by degrees 



at once, 

 do. 

 do. 

 do. 

 do. 

 do. 



do. 



do. 

 do. 



do. 



Do. by degrees. 



237- 



4.64177.47 

 4.47077.47 



Bright red. 



Do. 

 Very bright. 



Do. 



Do. 



Do. 

 Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



do. 

 do. 

 do. 

 do. 



slowly- 

 do. 

 do. 

 do. 



almost instantly. 



gradually. 



in few seconds- 



gradually- 



do. 



at once, 

 gradually- 



do. 

 in few seconds. 



rapidly, 

 gradually- 



slowlv. _ii 







It appears from the preceding table, that the least amount of steam 

 given by any of the experiments, was that of No. 1 . where, under 

 the head of decimal parts, we find 3£ per cent. ; and the greatest 

 amount was that of No. 34, where the same column exhibits 22 too 

 per cent. In the latter case, 4 T y f lbs. of metal gave a pound o 

 steam, while in the former, 26§ lbs. were required for that purpose. 



