220 



Bilasic Acids. 



b. White crystalline powder. 



Note. This specimen was prepared from carbolic acid ; it is of a 

 pinkish colour. 



GALLIC SERIES. CnHj 



526. GALLIC ACID. HC 7 H 5 5 . (I) ioxy salicylic Acid. Trioxyben- 



zoic Acid.") 



a. A commercial specimen. 



b. In nearly white acicular crystals. 



c. A fine specimen. Presented by Messrs. Morson & Son. 



CINNAMIC SERIES, C n H 2 _ 10 2 . 



527. CINNAMIC ACID. HC 9 H 7 2 . 



a. Crystalline scales. 



BIBASIC ACIDS. 

 M UCIC SERIES. C n Ha,, _ ! 8 . 



528. Mocic ACID. H 2 C 6 H 9 O 8 . 



a. White powder. 



SUCCINIC SERIES, C n H 2ll _ 2 04. 



529* OXALIC ACID. H 3 C 2 4 . 



a. Commercial specimen. 



b. Large rhombic prisms. 



c. Small acicular crystals, pure. 



Note. Specimen c much resembles ordinary Epsom salts in appear- 

 ance. 



530. SUCCINIC ACID. H 2 C 4 H 4 4 . 



a. Crystallized. 



531. SUBERIC ACID. H 2 C 8 H 12 4 . 



a. Crystalline powder. 



532. SEBACIC ACID. H 2 C| H 16 4 . (Sebic Acid.) 



a. Pearly crystalline scales. 



MALIC SERIES. C n H^ _ , OB. 



533. MALIC ACID. H 2 C 4 H 4 5 . 



a. Deliquescent prismatic crystals. 



TARTARIC SERIES. CnH-to-jOg. 



534. TARTARIC ACID. H 3 C 4 H 4 6 . (Deztro-tartaric Acid.) 



a. Crystals. 



535. RACEMIC ACID. H 2 C 4 H 4 6 . (Para-tartaric Add.) 



a. Crystals. 



