34 
As equality in the times indicates equality in the quanti- 
ties and velocities of the discharge for constant pressures, a 
simple inspection of the table shows that for discharging 
pressures as low as 6 lbs., the recipient air still acts as a 
vacuum up to half the density of the discharging stream, 
and the regularity of this law is maintained within the 
limits of 6 lbs. and 90 lbs. absolute pressure as shown in 
Table Y. For discharging pressures below 6 lbs., the rela- 
tive times of discharge and the resistance of the recipient 
air increase, and as we have already seen that the similar 
times and resistances for discharging pressures above six 
atmospheres diminish, the continuity of regular law is 
broken at both ends of the series of pressures, just as it is 
in the series of planetary distances and some other quanti- 
tative phenomena of nature. 
