52 - J, Schiel on Classification by Series. 
From this generic series are derived :— 
€sHs@s sorbic acid. €3H20s5 mesoxalic acid. 
€4H,O4 maleinic acid. €éH3@7 citric acid. 
€5H¢O4 itaconic —- 
€sHsO4 
€7Hi004 terebinic “ 
Acid series IV. 
€nH2n- 502 
€,Hen 603 
€,Hen-6O4 
€nHen-695 
From this generic series we derive :— 
€5He@2 oxyphenic acid. €;H103 pyromucic acid. 
€sHi0Q2 terebentilic “ €6HeO3 pyrogallic “ 
— €7Hs@3 ipecacuanic “ 
€sH083 ricinoleic “ 
€4H204 mellitic acid. €6H¢Qz5 aconitic acid.* 
€3H1004 cholesteric “ sie 
Acid series V. 
From this generic series we derive :— 
€7Hé@2 benzoic = €5H2@s krokonie acid. 
€sH,82 — €¢H,185 comenic “ 
€4Hi0P2 2 €,H.05 gallic ~ 
€30Hi202 cuminic “ €uHiaO@s cholic “ 
. €7H60sz salicilie acid. 
€sHsG¢ phenoxacetic acid. €sHs@3 anisic = “ 
€9H1003 phloretinic acid. 
* The radical of the tribasic aconitic acid eo ae: @3 may be derived 
from a hydrocarburet by on of He by Qs, as acetic acid is formed by sub- 
stitution of He by © in the radical €2Hs. The triacid alcohol or glycerin corres- 
pie to aconitic acid would therefore be —9 @3; it belongs to the 
series IJ, answering to the general formula €,,H2,03, and the type 
ea ny @3, This remark applies, mutatis mutandis, to other acids, 
