Peters and Sauchelli — Succinic Acid as a Standard. 247 



the ammonia. This gave the ammonia a normality of 0*1240. 

 The figure obtained by the titer against hydrochloric acid was 

 ~N. 0-1224. When the succinic acid was titrated against ammo- 



Table I. 



Electro-titraruetrically 

 10 cc ammonia 



By Titration 



Succinic 

 Acid 



Solution 

 cc. 



Bridge 

 Readings 



Succinic 



Acid 

 Solution Bridge 

 cc. Readings 



Succinic 

 Acid 

 Ammonia Solution 

 cc. cc. 



I 





II 





I & II 



6-6 



57-1 



7-1 



55-7 



40-20 44-7 



7-2 



56-5 



7-6 



54-6 



40-00 45-0 



7-9 



55-3 



8-09 



54-3 



40-00 41-3 



8-8 



56-2 



8-75 



55-3 



40-00 40-7 



9-8 



57-5 



9-4 



56-6 



40.40 41-0 



10-62 



III 



58-8 



10-1 



IV 



57-5 





200-60 212-7 



8-6 



44-2 



8-75 



39-7 



III, IV & V 



9-2 



43-8 



10-00 



38-4 



30-0 61*2 



10-2 



42-5 



11-05 



37-4 



30-0 50-0 



11-2 

 12-1 



41-6 

 41-0 



13-05 

 13-7 



36-2 

 35-5 





60-0 111-2 



13-55 



40-0 



15'6 



34-2 





14-55 



39-2 



16'8 



35-2 





16-3 



39-2 



18-6 



37-0 





18-4 



40-6 



20'5 



38-5 





20-05 



42-5 



23-0 



40-5 





V 











10-05 



37-0 









11-15 



36-6 









11-90 



366 









12-6 



35-5 









13-6 



35-3 









14-5 



34-3 









16-6 



34-8 









18-05 



36-2 









19-7 



37-3 









21-5 



39-0 









nia using cochineal as described by Phelps and Hubbard, in 5 

 titrations 200'6 CO of ammonia were used against 212 -7 0C of 

 succinic acid, the normality of ammonia was 0-1313. The 

 individual variations in the amounts of succinic acid used were 

 as high as 1 2 per cent, and the end points always were uncertain. 



