376 SOLUTIONS OF CERTAIN HYDROXIDES—MACGREGOR. 
For dilute solutions of Barium Hydroxide, therefore, the ex- 
pansions are negative. But the available data are not sufficient 
to shew fully how the contraction varies with the concentration. 
The following table shews the values of the expansions on 
dissolving Barium oxide in water :— 
Volume at 18° 
Density at Vol fal 
Tae of oh an ps of solut’. ca: ot re 
: : b i t 18 ; 5 cu. cm. 
in solution. eae cL (en: cm.) ee 
1.1900 1.0128 0.9873 0.9894 —0.0021 
2.3890 1.0271 0.9736 0.9774 —0.0038 
