﻿<)/' Phosphorus y Sulphur, and Aldehyde* 



529 



to remain over night filled with a solution of potassium per- 

 manganate and hydrochloric acid. The manganese dioxide 



formed was removed by means of oxalic acid ; the apparatus 

 was then well washed with distilled water and dried by a 

 current of air. 





Pressure of 



Pressure of 







Time. 



Oxygen. 



Aldehyde. 



K. 



Remarks. 





Pv 



Pv 







11.26 a.m. 



1968 



543-2 





Cloudy. 



11.50 „ 



182-0 



510-2 



076 





12.21 p.m. 



160-4 



4576 



0-89 





2.33 „ 



863 



269-5 



119 



Direct sunlight 



3.6 „ 



72-8 



2413 



1-24 



on apparaais. 



3.56 „ 



57-5 



211-2 



1-27 





7.8 ,. 



28-7 



1581 



1-20 





8.17 „ 



23-7 



149 1 



1-08 



Nearly dark. 



The folio, ving Table contains the results of the experiments 

 which were made with the precautions mentioned : — 



Table VI. — Aldehyde and Oxygen. 



Time in 



Pressure 



Pressure 



Total 





minutes from 



of 



of 



KxlO 5 . 



the beginning. 



Oxygen. Aldehyde. 



pressure. 



t 



Pv Pv 



P. 









22.V8 



536-0 



785-0 





67 



210-3 



499-1 



744-5 



2 91 



117 



200-5 



466-9 



702-5 



2-94 



190 



188-1 



427-3 



651-5 



2-81 



259 



177-1 



395-8 



608-0 



2-84 



270 



174-6 



388-8 



598-5 



2-93 



296 



1672 



368-7 



571-0 



316 



332 



161-4 



353-5 



5500 



319 



386 



150-7 



324-7 



510-5 



3-43 



476 



136-6 



292-3 



464-0 



3-57 



673 



118-3 



261-6 



405-0 



3-40 



1303 



83-8 



183-1 



3020 



3-29 



Temperature = 20°-l to 20°-32. 





Partial pressure of oxygen at the end of experiment = 8 



34 millim. 



Partial pressure of nitrogen at the end of experiment = 2 



!-7 .. 



Total pressure at the end of the experiment . , . = 30 



1 



Vapour-pressure of acetic acid at 20° *2 . . , . = 1 



14 ,. 



k' =0-002873. 





