296 



BACON. 



January 18, 1910, Manila. Day somewhat hazy. Each dish contained 20 cubic 

 centimeters — oxalic acid. 



Number. 



Time. 



Decom- 

 position. 



1 



a.m. p. m. 

 9.00-1.00 

 9.00-3.30 

 9.00-3.30 



Per cent. 

 3C 

 94 

 94 



2 _ _ __ _ 



3— 



___ 



January 10, 1910. Manila. Day began as a bright one, but there was not 



N 



uracil sun during the afternoon. Each dish contained 20 cubic centimeters 

 oxalic acid. 



20 



Number. 



Time. 



Decom- 

 position. 



j Decom- 



Hours. I position 



per hour. 



1 1 



1 



a.m. p.m. 

 8.00-10.00 

 8.00-11.00 

 8.00- 1.00 

 8.00- 3.00 

 8.00- 4.00 

 8.00- 5.00 



Per cent. 

 . 6 



12 

 24 

 48 

 7(i 

 100 



Percent. 

 2 3 







3 4 



3 . 



4 



5 5 



7 7 



5 



8 9.5 



9 11.1 



1 



6 _ 





The graphic representation given on the opposite page shows the 

 results of this autocatalysis very clearly. 



February 4, 1910, Manila. Bright sun for the greater part of the day. Each 



N 

 dish contains 20 cubic centimeters — oxalic acid and one dish, containing 20 



cubic centimeters pure water, was also exposed during this time. 



Number. 



Time. 



Decom- 

 position. 



Hours. 



Decom- 

 position, 

 per hour. 



1___ __. _ .. 



a.m. p. m. 

 8.40-10.40 

 8.40-12. JO 

 8.40- 1.40 

 8.40- 2.40 

 8.40- 3.40 



Per cent. 

 10 

 36 



50 



70 



100 



2 

 4 

 5 

 



Per cent. 



5 



9 



10 

 11 



2 _ _ 



3 _ 



4 ______ 



5 



7 14. 3 j 







__| 



A series of duplicate dishes was prepared for examination together 

 with this test, and at time of the determination of the acid, tests for 

 hydrogen peroxide were also made on these. Number 1 gave a doubtful 

 test for hydrogen peroxide, but numbers 2 to 5 show a continually in- 

 creasing amount of hydrogen peroxide whereas the dish of pure water 



