506 Dr. Redtenbacher on a Class of Organic Acids. 



lizations still contained valerianic acid ; the third and fourth 

 crystallizations had all the properties of butyric acid, and 

 were again crystallized ; upon analysis it gave the following 

 result. This, as well as all the following analyses, was made 

 with chroraate of lead. 



0*415 grm. butyrate of baryta gave 0*261 grm. carbonate of 

 baryta; 0*4697 grm. of the same salt gave 0*5265 grm. car- 

 bonic acid and 0*1955 grm. water. 



Calculated. Found. 



8 eqs. Carbonic acid. . 600*0 30*86 30*57 

 7 ... Hydrogen . . . 87*5 4*50 4*62 

 3 ... Oxygen. . . . 300*0 15*43 15*95 

 1 ... Baryta .... 956*9 49*21 48*86 



1 ... Butyrateofbarytes 1944*4 100*00 100*00 ■' 



As already stated, the oily stratum which floated on the 

 liquid in the receiver, and which contained the less soluble 

 acids, was saturated with caustic baryta, and a series of cry- 

 stallizations of the baryta salts thus produced. 



4. Valerianic Acid. — The soluble salts below crystallized 

 in clusters of large plates, with the known properties of vale- 

 rianate of barytes. 



0*268 grm. valerianate of barytes gave 0*154 grm. carbonate 

 of barytes; 0*394 grm. gave 0*506 grm. carbonic acid and 

 0*1935 grm. water. 



Calculated. Found. 



10 eqs. Carbonic acid . . . 750*0 35*38 35*03 



9 ... Hydrogen .... 112*5 5*31 5*46 

 3 ... Oxygen .... 300*0 14*15 14*87 



1 ... Baryta 956*9 45*1 6 44*64 



1 ... Valerianate of baryta 2119*4 100*00 100*00 



5. Caproic Acid. — The foregoing second and third cry- 

 stallizations of the valerianate of baryta appeared in small 

 semiglobular druses, which were made up of small prismatic 

 crystals. These were now recrystallized, and had then all the 

 appearance and properties of caproate of barytes. 



0*282 grm. gave 0*149 carbonate of barytes; 0*5085 grm. 

 gave 0*7255 carbonic acid and 0*270 grm. water. 



Calculated. Found. 



12 eqs. Carbonic acid . . . 900*0 39*22 38*92 



11 ... Hydrogen .... 137*5 5*99 5*90 



3 ... Oxygen 300*0 13*08 14*14 



1 ... Baryta 956*6 41*71 41*04 



1 ... Caproate of barytes . 2294*4 100*00 100*00 



6. (Enant hylic Acid. — Between the crystallization of ca- 



