ON NITROUS OXIDK IN TUli UASliOUS AND LiqUlU MATES. 



310 



2. The pressure required to liquefy the nitrous oxide und the volume of 

 this gas at the bcgmniug of liquefaction arc variable. 



The pressure required to liquefy the gas at 25°-15, recorded in Table I., is 

 the mean of the following observations : — 



The following series of experiments was perfbi-med iu the course of a 



day:- 



At 32°-2 the greatest difference of pressure amounted to 2 iitmosphcres, as 

 appears from the next series of experiments. 



