310 Scientific Intelligence. 
residual molecules of sodium or potassium carbonate and of calcium 
chloride, would also increase the chances in favor of collision oc- 
¢ 
the excursions of these residual molecules, or tending to increase 
the number of molecules which take no part in the production of 
calcium carbonate, and hence to decrease the chances of the sodium 
or potassium carbonate and the calcium chloride molecules coming 
into collision, wenld also tend to diminish = amount of calcium 
t m 
solutions would tend to decrease the chances of snme hea 
the two sets of molecul 
13. eS a —In the Journal of the Ciethinal: Society jet 
err 
Mintz (Compt. rend., lxxxiv, 301). These experimenters ha 
sought to establish two points firs t, that rapes vapors prevent 
nitrification; secondly, that ibisificasion may be induced by seed- 
ing in many cases sufficient t oad oy all the germ nie chitiek in 
an organic hey while tina solution kept in darkness developed 
bacteria fr earing of this observation on the fact that 
The pase ‘retards or even prevents nitrification is obvious. 
e oor of light on nitrification was not apparently quite 
known ; it is twice hinted at in Gmelin’s Chemistry es ‘endish 
Translation, > 68, vii, =} but it is not mentioned to oT 
ubjec 
t. Reczunination re some of Haloid laioniec of An * 
Cooks, Jr. (Proceedings of the Amert- 
eda oF. of Aria and Blcies vol. xiii. Boston, 1877).— 
paper co: 
Ieal and ci yveadinurrahiegs relbtiuaih of the iodide of antimony in 
particular, but also of the chloride, bromide, and the oxichlorides, 
oxibromides, and oxi-iodides. The chloride and the bromide of | 
