to Trioxybutyric Acid. 
341 
Reduction of Calcium Trioxybutyrate by Hydriodic Acid and 
Phosphorus. 
Fifteen grams of calcium trioxybutyrate were heated for 
8 hours on a sand bath with 130 c.c. of hydriodic acid, b.p. 127°, 
and 5 grams of amorphous phosphorus. The brown liquid was 
diluted with an equal volume of water and shaken with ether. 
On evaporation of the ether a brown oil was left, which was 
treated with dilute sulphuric acid and zinc dust, and then distilled 
in a current of steam. The distillate was neutralised with calcium 
carbonate and the filtrate, after concentration on the water bath 
in a vacuum, was treated with silver nitrate. The silver salt pre- 
cipitated was silver butyrate, which was confirmed by its peculiar 
odour and by a silver determination. 
'2435 gram silver salt gave T345 gram silver; °/ o A g = 55'4 ; 
•1708 •„ „ '0948 „ %Ag = 55'5; 
calculated for (C 4 H 7 0 2 ) Ag = 55*3. 
25—2 
