( 99 ) 



Cone, of AgNOg before the experiment: normal. 



,., ( anode 1.37 normal 



f cathode 0.94 „ 

 1 original solntion 36.498 

 Weight of measuring flask after the distill, j solution at anode 36.508 



' I, ,/ ('athode36.503 



III. Meth. ale. of 64 "/„ by weight. Small apparatus. Current 0.15 

 ampère. Time: 372 hours. Silver on the eathode : 1.80 gi. 

 Cone, of silver before the experim. : normal. 



P ( anode : Ag NO^ erystal. out 



If If If filter If If ' 



( cathode: 0.73 normal. 



I original solution 35.100 

 Weight of measuring flask after the distil, j solution at anode 35.100 



' „ at cathode 35.094 



By an easv calculation we now find that if for instance, the 

 Ag- or NOg-ion had carried with it one molecule of the solvent, for every 

 4 grams of silver an inci-ease or decrease of 0,6 to 0,7 gr. of water 

 or of about 1.2 grams of methylaleohol at the anode or cathode would 

 have been stated. This wonld have been plainly detected by the 

 analysis even though the amount had been largely diminished by 

 diffusion ^). 



I have to thank my assistants Messrs. C. L. Jüngiüs and S. Tymstha 

 for their assistance rendered in these experiments. 



Chemistry. — Prof. C. A. Lobry de Bruyn presents communication 

 N°. 5 on Intramolecular Migrations: C. L. Jungius. "The 

 mutual transforni'itlon of the tiro stereo-isonieric metliyl-d- 

 glucosides." 



1. When in 1893 Emil Fischer^) discovered the glueosides of the 

 alcohols and proposed for these substances a formula deduced by 

 him from the glucose-formula of Tollens, namely 



CH3O— CH— CHOH— CHOH— CH— CHOH— CH.OH, 



I 0— 1 



he suggested that on account of the appearance of a new asymmetric 



1) It is possible of course that the two ions act in the same manner and carry 

 with them equal quantities of one of the solvents or of both. 



2) Ber. 26. 2400. 



