384 



§ 5. Temperature-coefjicients of [a of the here studied substances. 



Methyl-Methylacetyloacetate. 



between —71° and -21° 3,39 



-21° „ 0° 2,47 



0° „ 70° 2,18 



70^ „ 156° 1,94 



Methyl- Cyanoacetate. 

 between —76° and — 16^ not measurable 

 independently of 

 viscosity. 

 —16° ,. +197° 1,90 



Ethyl-Propylacetyloacetate. 



Then an increase : 2,37 to 2,68, occurs 

 as a consequence of beginning dissociation. 



between 



Ethyl- Cyanoacetate. 

 •17° and +201° \,i 



