﻿974 Dr. Thomas on Discharge of Air through Small 



Results and Discussion. 



Table I indicates the general nature of the observations 

 and the calculations based thereon. 



(a) Discharge. — Fig. 4 shows how the discharge through 

 the various orifices of the series depends upon the pressure 

 and diameter of the orifice. The results shown in this figure 

 all refer to orifices in disks^ of thickness 0*0229 cm. 



-0-5 0-5 1-0 



LOG OF PRESSURE IN CMS OF VWTER 



Particulars of the diameters of the various disks are given 

 in the diagram and are tabulated in Table II. below. In the 

 figure, the logarithms of the discharge are plotted as ordinate 

 against the logarithms of the corresponding pressures 

 as abscissae, all volumes being reduced to 0° C. and 760 mm. 

 pressure, dry. 



It is clearly seen from fig. 4 that the experimental results 

 may be represented algebraically with considerable accuracy 

 by a linear relation between the logarithms of the pressures 

 and discharges respectively. The lines drawn in fig. 4 are 

 the tl best fitting " straight lines which can be drawn through 



