— 154 



7? 



pyrogallol trimethylether the authors succeeded, by reacting with sodium 

 in alcoholic solution, to eliminate without trouble a methoxyl-group, with 

 formation of resorcinol dimethylether. 



Acids. 



In order to be in a position to compare the physical properties of 

 the methylesters of monocyclic dicarboxylic acids, F. W. Semmler and 

 E. W. Mayer 1 ) have prepared several such esters. The dimethyl ester of 

 ?'sofenchone carboxylic acid has the following constants: b. p. 131 to 132° 

 (14 mm.), d 2 oo 1,0515, « D — 19°, n D 1,4540. Camphoric dimethylester boiled 

 at 137 to 139° (14 mm.) (149,5° at 11 mm. and 155° at 15 mm. according 

 to Bruhl and Braunschweig) 2 ). «-Tanacetogene dicarboxylic dimethylester 

 has the following constants: b. p. 129 to 130° (15,5 mm.), d|| 1,0525, 

 « D + 148°, n D 1,4510. /2-Methyladipic dimethylester is a liquid with b. p. 

 122 to 122,5° (18 mm.); d 20 o 1,0372; n D 1,4336. 



Nitrogenous bodies. 



On the occurrence of hydrocyanic acid, see p. 124. 



On the determination of hydrocyanic acid, see p. 121. 

 On the occurrence of indole and scatole, see p. 124. 



*) Berl. Berichte 44 (1911), 2011. 

 2 ) Berl. Berichte 25 (1892), 1809. 



Schimmel $ Co.'s Printing Office, Miltitz near Leipzig. 



