I. RESEARCH. 489 



Diacetotartaric anhydride C 8 H 8 O 8 =C 2 H 2 



CO 

 CO(OEt) 



Benzotartaric ether C 15 H 18 O 7 = 



O(OEt) 



CO(OEt) 



Acetobenzotartaricf ether C 17 H 20 O 8 = C 2 H 2 { 



CO(OEt). 

 CO(OEt) CO(OEt) 



Succinotartaric ether CyfL M O u = C 2 H 2 { (^^Q) } ^ 



CO(OEt) CO(OEt). 



VIII. 



COH 

 Hydride of methylsalicyl C 8 H 8 O 2 = | 



C 6 H 4 (0 Me) 



Hydride of ethylsalicyl C 9 H 10 2 = | 



C C H 4 



COH 



(OEt) 

 IX. 



*i|i i x v V S 



Hydride of salicyl and acetic anhydride C 11 H 12 O 5 = J 



C 6 H 4 ( ~~ 



CH f(OAc) 

 = I 



- ~n 12T 



X. 



.(OH). 



Coumarin C 9 H 6 O 2 , artificially prepared from hydride of sodium-salicyl, 

 and acetic anhydride. It is probably ortho-oxyphenyl acrylic anhydride 



Propionic coumarin, ortho-oxyphenylcrotonic anhydride 



produced as above, but employing propionic anhydride. 

 Butyric coumarin, ortho-oxyphenylangelic anhydride 



prepared as above, but employing butyric anhydride. 



Valeric coumarin, ortho-oxyphenylpyroterebic anhydride (?) 



prepared as above, but employing valeric anhydride. 



