OXALIC ACID AND URANIUM SALTS AS A PHOTOMETER. 297 



gave only a faint test. The results are represented graphically on the 

 following diagram. 

 /'00\ 



90 



80 



o 

 ■ \. 



■ •v. 



70 



60 



50 



4-0 



30 



20 



/O 



















j 



















1 

















• 



I 





























■^ 





\fl 





■ 











/ 





f 



w 















*/ 



\ o 7 



\y 













y/ 





V 













f 



$p- 































I 



8 



3 4-56 



Time in hour-* 



Other results with the solutions of oxalic acid in Manila are as 

 follows : 



N. 



so 



Date. 



oxalic acid. 



Time. 



Decom- 

 position. 



Remarks. 



a. m. p. m. 



February 17 8.45-2.30 



Do .". : 8.45-4.30 



February 23 ! 9.00-2.00 



February 27 8.00-3.00 



February 28 9.00-4.30 



May 1 j 10.40-2.40 



March 4 8.30-3.00 



March 8 8.00-4.00 



96918 5 



Per cent. 

 44 

 86 

 95 

 100 

 91 

 85 



100 

 100 



Bright sun. 



Do. 

 Very cloudy day. 

 Sun about hah' t h e 



time. 

 Bright sun. 

 Do. 



