278 



Mr. O. Reynolds on the Condensation of a [May 1, 



stream of water was kept constant, and in the other it was altered, so 

 that the effluent water was kept at a constant temperature. 



11. The results of these experiments are shown in Tables I., II., III. 



The letters which head the columns have the following meanings : — 



/ stands for the volume of the flask in cubic centimetres. 



a stands for the volume of the air at the pressure of the atmosphere. 



7i stands for the height of the barometer in millimetres of mercury at 

 the time of the experiment. 



\ stands for the height of mercury in the gauge in millims. 



t stands for the temperature Centigrade of the effluent water. 



stands for the temperature of the water in the flask, found from 

 Eegnault's tables of boiling-points. 



P±=h — \ stands for the pressure within the flask in millims. of mercury. 



p 2 = a --\- Ji o tl — stands for the pressure of the air within the flask 



corrected to the temperature T r 

 P z =P 1 —p 2 stands for the pressure of the steam. 



stands for the ratio of the pressure of the air in the flask to that of 



Pz 



the steam. 



Table I. 



A =756, * = 9, /=500. 



a. 





h v 



Drops per 

 minute. 



Pv 



IV 



Pz- 



1 



Pz 



Pz ' 



2000. 



Pz 







9 



754 





2 







2 





•o 









22 



736 





20 







20 



•0500 



•o 



100 



1-5 



36 



712 





44 



2-4 



41 



•0240 



•06 



48 



5-0 



52 



654 





106 



8-7 



97 



0110 



•09 



22 



10 



66 



557 



56 



199 



18-4 



183 



•0055 



•10 



11 



13 



70 



521 





235 



23-7 



211 



•0050 



•11 • 



10 



21 



77 



433 





323 



40-0 



283 



•0035 



•14 



7 



30 



84 



330 





426 



57 



368 



•0027 



•15 



5-4 



40 



88 



264 





492 



77 



414 



0024 



•18 



4-8 



50 



93 



179 



56 



577 



97 



479 



•0020 



•20 



4 



60 



96 



115 





641 



117 



523 



•0019 



•22 



3-8 



70 



98 



55 





701 



138 



562 



•0017 



•24 



3-4 



80 



100 









756 



159 



596 



0016 



•26 



3-2 



Table II. 

 7*0 = 457, / =500. 



a. 





*v 





Drops per 

 minute. 



Pv 



iv 



Pz- 



Si. 

 Vz ' 



Drops 



fz 



Drops. 







27 



66 



567 



100 



190 







190 





53 



42-4 



2-5 



24 





572 



84 



185 



4-5 



180 



•022 



45 



36 



5 



20 





582 



59 



175 



9 



166 



•055 



35 



27 



10 



13 





582 



21 



175 



19 



156 



12 



14 



11-2 



27 



10 





582 



10 



175 



48 



127 



•39 



76 



60 



37 



10 



5) 



579 



10 



177 



66 



111 



•66 



9 



7-2 



50 



9 





572 



8 



184 



90 



94 



•10 



8 



64 



