256 Scientific Intelligence. 
the sum of the radii of the molecules is equal to zero and for 
smaller distances increases to a great degree. BoLTzMANN re- 
act. Boltzmann therefore considers the question 
whether the hypothesis of attracting force alone is a tenable one. 
He finds that Maxwell’s formulas based upon the old hypothesis 
of repulsive force apply to the new hypothesis with suitable 
changes in the constants.—Ann. der Physik und Chemie, No. 1, 
1885, pp. 37-44. I. 
12. Hlectrical Resistance of distilled water.—F rizpricu Kost 
RAUscH shows that water distilled in a vacuum has a much 
greater resistance than ordinary distilled water which takes up 
i He d 
in thickness. The resistance of a column of water 1 square milli- 
meter in section and 1 meter long is about 4°10°° ohms. A CO 
per wire of the same section and resistance would be 24°10 
kilometers, which measures a distance through which it would 
take light 2°2 hours to travel. Ann. der Physik und Chemie, 
No. 1, 1885, pp. 48-52. oe 
13. Double refraction of light in fluids.—Double refraction has 
b 
right-handed circular polarizing liquid with a left-handed circular 
gare ge liquid might produce two wave-fronts which would give 
: u ” . 
