PHYSICAL CHAEACTEES OE MIXTUEES AND SOLUTIONS. 
351 
Explanation op the Plate. 
In the Plate the abscissae represent the percentage by weight of alcohol. 
PLATE XLVXI. 
Upper Half. 
The ordinates give the specific heats, water taken as 100. 
The ordinates give the boiling-points in degrees Centigrade, at 757’4 millims. 
pressure. 
The ordinates give the capillarity in millims., water =100. 
The ordinates give the expansion for 10,000 volumes. 
The ordinates give the compressibility in millionths. 
Under Half. 
The ordinates in Curves 1 to 5 have the same significance as in the upper half, except 
that they give the deviation of the numbers found from the theoretical mean instead 
of the numbers themselves. 
Curve 6 gives the heat produced by mixing, the ordinates representing units of heat. 
Curve 7. The ordinates give the deviation of the specific gravity from the mean, for 1000 
volumes of mixture, at a temperature of 10° Centigrade. 
The zero line represents the mean value of all the properties. 
The points directly ascertained by experiment are marked either by a circle or a cross. 
Curve 1. 
Curve 2. 
Curve 3. 
Curve 4. 
Curve 5. 
3 c 
MDCCCLXXII. 
