system of Notation to express Chemical Reactions. 275 



or dioxethylate of soda, consisting of 1 molecule of dioxethylene 

 united to 1 molecule of the monohydrate of soda. The dupli- 

 cation of the oxide of ethylene molecule in such reaction will be 

 admitted as extremely probable, although it cannot be tested by 

 vapour-density measurement. See Ann. de Chim. vol. lxix. pp. 

 324, 326. 



The glycol monosode being melted with sodium at 190° C, 

 more hydrogen is evolved, and the white dry deliquescent glvcol 



{€ 2 H 4 ~1 

 Na 2 I ®*> * s 0Dtame( *- This, by the V.D., is either 



2(CH 2 O i ).2(NaO i ) one molecule, or 2(CH*0*.NaO*) two 

 molecules. 



P. 417. The analysis of glycolate of silver is C = 24, H = 3, 



Ag=108, = 48; and since Ag = 108 + = 8 is AgO* one 



molecule oxide of silver, we have C 2 H 3 2 as the representative 

 of one molecule of glycolic acid, and the same represents the 

 constitution of the acid in the analysis of glycolate of lime, 



C 2 H 3 O 2 * . CaM The hydrated acid molecule is C 2 H 3 2 *. HO*, 



and should not be represented by CH 2 ?> which involves the 

 absurdity of half a water-molecule. 



P. 419. Action of hydrate of potash on glycol is represented 

 « par F equation suivante, € 2 H 6 O 2 + 2 KHO = € 2 K 2 O 4 + H 8 ; " 

 and by V.D. 



1 mol. glycol CH 2 0*. HO-1 250° [C0 H . KO^ {* ofpoS^ 

 l 7lS &te } KOiHO*j= lH,H,H,H,{4mol Sf hydro. 



A curious feature of this reaction is the decomposition of the 

 water-molecules. 



P. 419. Action of muriatic acid on glycol. — "II a donne h 

 P analyse des resultats qui conduisent h la formule G 2 H 6 CIO. 

 Ce produit resulte evidemment de Faction d'un seul equivalent 

 d'acide chlorhydrique sur Pequivalent de glycol, et se forme en 

 vertu de la reaction suivante 



G 2 H 6 2 +HC1=G 2 H 3 C10* + H 2 0. 



Glycol. Glycol mono- 



chlorhydrique. 



"Pajoute que le glycol monochlorhydrique rcprescnte du glycol 

 dans lequel 1 equivalent de chlore est venu prendre la place du 



[* Query G 2 H 5 C10.] 



T2 



