Chemistry and Physics. 269 
The action of zinc upon a mixture of iodid of ethyl and oxalate of 
amyl gives rise to a new ether which the authors term diethoxalate of 
amyl and which has the formula | 8 ame 
It is colorless and oily with an agreeable somewhat amylic odor and boils 
at 225° C. It will be readily seen that this ether is isomeric with ethyl- 
ated amyl-hydroxalates of ethyl. By the action of zine upon a mixture 
of iodid of amyl and oxalate of amyl the authors obtained two ethers, 
the first of which has the formula i oe and may be termed di- 
mo 
amyloxalate of amyl, while the second had the formula and properties 
of capronic ether S “ire. * In conclusion the authors give an elab- 
orate and extremely interesting discussion of the classification and theory 
of the acids of the lactic series, for which however we must refer to the 
original. The following summary of their results is in their own language. 
1.) AH the acids of the lactic series are essentially monobasic. 
2.) These acids are of four kinds, namely, normal, secondary, nor- 
mal olefine acids and secondary olefine acids; and each of these has its 
own series of etheric acids in which the hydrogen of the hydroxyl con- 
tained in the positive or basylous constituent of the acid is replaced by a 
Positive or negative compound radical. 
( e normal acids are derived from oxalic acid by the replacement 
of one atom of oxygen either by two atoms of hydrogen, or by one atom 
of hydrogen and one atom of an alcohol radical. 
oxalic acid by the replace- 
f monovalent alcoholic rad- 
bien . 
{7.) The acids of the lactic series stand in an almost equally simple 
telation to the acids of the acrylic series as appears trom & comparison 
of the follow; €(€H,)HHo €(€H,)"H 
ollowing formulas: } €OHo €BHo 
Lactic acid. 
—Ann. der Chemie und Pharmacie, exlii, 1. 
4. Thallie acid —E. Carsransen states that when thallic oxyd, pre- 
PY omaae from the chlorid of ammonia, is suspended in a strong solution 
: uick cu 
tains potassic thallate. It may be evaporated, and even filtered throug 
at work upon this interesting compound —d. pr. Ch. eh, 9°, — 
