ILLUSTRATIONS. 



PLATE. 



Page. 



PLATE I. The balance, the oven, and the upper portion of the calo- 

 rimeter Frontispiece. 



TEXT FIGURES. 



FIGURE 1. The ice calorimeter and ice jacket in vertical section 9 



2. Distribution of results through the range of initial temperatures, 



and average results for each half degree 22 



3. Frequency curve and its development 23 



4. Curve for correcting distribution of results for smooth frequency 



curve 2*4 



5. Empirical and theoretical frequency curves 25 



6 



