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reaction is the smaller, notwithstanding the fact that according to 
the researches of MENSCHUTKIN and CARRARA, methylalcohol itself 
accelerates similar reactions to a greater extent than ethylalcohol. 
It appears to us therefore that it follows from this case, as in the 
case of the reaction of o-dinitrobenzene and alcoholate, that reactions 
taking place in solvents other than water depend on circumstances 
which are as yet unknown, in addition to the degree of dissociation 
into ions. . 
From our earlier research we had concluded that the sodium 
dissolved in a 50°/, mixture of alcohol and water is present mainly 
as alcoholate. The same conclusion may be drawn from an experi- 
ment in which a solution of 5 grams of Na in !/, litre of a 50 °/, 
mixture of alcohol and water was warmed to 25° for 8 days with 
32 grams (1 mol.) of ethyliodide. By means of several fractional 
distillations about 11.5 grams of ethylether were obtained, the 
theoretical quantity being 15.5 grams. Considering the unavoidable 
losses it may therefore be said that by far the greater part of the 
iodide was converted into ether. 
It is still necessary to examine reactions such as those here 
studied, in mixtures of alcohol and water containing a Jarge pro- 
portion of water, since in these there cannot be much alcoholate. 
The details of this research will shortly be published in the 
“Recueil des travaux chimiques.” 
Chemistry. — Mr. Prof. H. W. Baknurts Roozesoom speaks on: 
„An example of the conversion of mixed crystals into a 
compound’. 
(Read in the meeting of June 24'h 1899.) 
In the meeting of the 25% February 1897, page 376, I gave an 
explanation of the solidification of mixtures of optical isomers, when 
the solidification results in the formation (1) of a conglomerate (2) 
of mixed crystals, (3) of a racemic compound. 
In a more complete paper, Zeitschr. phys. Chemie 28, 512, I 
have further developed the theory of the phenomena which must 
occur when these three types pass into each other when the solid 
mass is further cooled. 
As one of the most interesting cases, Mr. ADRIANI, has at my 
request, studied an example of the conversion of mixed crystals into 
a compound below a certain temperature. 
The example was camphoroxime. Mr. ADRIANI prepared the 
