SYNTHETICAL EESEAECHES ON ACIDS OF THE LACTIC SEKIES. 333 



Ethylic ethyl-amylhydroxalate is a straw-coloured oily liquid, possessing an aromatic 

 but somewhat amylic odour and a burning taste. Its specific gravity was found to be 

 •9399 at 13° C. It boils between 224° and 225° C. A determination of the specific 

 gravity of its vapour by Gay-Lussac's method gave the following numbers : — 



Weight of ethylic ethyl-amylhydroxalate •1729 grm. 



Observed volume of vapour 46^57 cub. centims. 



Temperature of bath 261° C. 



Height of barometer 768 millims. 



Difference of heights of mercury inside and outside tube , . 110 millims. 

 Height of spermaceti column reduced to millims. of mercury 16^5 millims. 



These numbers give the density 6^29, whUst the above formula requires 6^92. 

 Section C of the oily product, boiling about 262° C, was next submitted to investiga- 

 tion. It gave on analysis the annexed results : — 



I. -2400 grm. gave ^5977 grm. carbonic anhydride and ^2479 grm. water. 

 II. •2032 grm. gave -5046 grm. carbonic anhydride and ^2109 grm. water. 



Translated into percentage numbers, these data aflford the following comparison with 

 those calculated from the formula 



C,,H,3 03,or j^^y^Ho 



14 28 3, IcOEtO 



Calculated. Found. 



, A . , A . 



( ^ ( \ 



I. II. Mean. 



Ci4 . . . 168 68-85 67-92 67-73 67-83 

 H28 . . . 28 11-47 11-48 11-53 11-50 

 O3 ... 48 19-68 



2I4 100-00 



The body is therefore ethylic diamyloxalate, the normal homologue of ethylic diethoxa- 

 late, as is seen from the following comparison : — 



fCEtgHo rCAygHo 



IcOEto IcOEto 



Ethjlic diethoxalate. Ethylic diamyloxalate. 



The production of ethylic diamyloxalate is explained by the following equations : — 



Ethylic oxalate. Ethylic zincmonamyl- Zincic amylo- 



diamyloxalate. ethylate. 



CAy2(0Zn"Ay) „TT n JCAyoHo , * tt . 7 /rxT 

 COEto +^^^^=lcOEto + AyH + Zn Ho, 



Ethylic zincmonamyl- Ethylic Amylic Zincic 



diamyloxalate. diamyloxalate. hydride. hydrate. 



MDCCCLXVI. 2 Z 



