588 



SEC. 13. - CHEMISTRY. 



CO 

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



(JO 



CO(OEt) 

 Benzotartaric ether C 16 H 18 O 7 =C 2 H 2 { 



Acetobenzotartaric ether 



Succinotartaric ether 



CO(OEt) 



CO(OEt) 



= C 2 H 2 



CO(OEt). 

 CO(OEt) 



CO(OEt) 



VIII. 

 COH 



CO(OEt) 



M 



CO(OEt). 



Hydride of methylsalicyl C 8 H 8 O 2 = 



Hydride of ethylsalicyl C 9 H 10 O 2 



C 6 H 4 (0 Me) 

 COH 



Hydride of salicyl and acetic anhydride 



C 6 H 4 (OEt) 

 IX. 



CH{^AC) 



ide C n H 12 5 = I 1 ( Ac > 

 C 6 H 4 (OH). 



X. 



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. 



