above seven orders I was unable to obtain any reliable figures of heart weight. Table 3 is a combination of data from Tables 1 and 2 for the principal orders from which we have enough material (at least one hundred autopsies) and for which it is possible to obtain as comparative standards figures indicating the weight of the normal heart in kilograms of body weight; Table 4 gives these ratios for normal hearts. The information about the weights was obtained from some of our own figures and the references given in the footnote.[11] There are no extensive data upon weights and measures in exact terms, such as body weight, so that we are limited to the numbers quoted in parentheses besides the orders in the table. The ratios might be modified slightly by a greater number of examples, but they show certain things by comparison of the classes; in a rough manner the heart ratios correspond to the pathology. TABLE 3. _Table Containing a Condensation of the Two Foregoing Tables and Showing Figures for Degenerations, Hypertrophy and Dilatations for Orders Having the Largest Number of Autopsies._ ═════════════════╤═════════════════╤═════════════════╤═════════════════ │ Degenerations, │ Hypertrophy │ Dilatation │ &c. │ │ ─────────────────┼─────────────────┼─────────────────┼───────────────── Primates │ 7.6│ .8│ .8 Carnivora │ 11.│ 2.1│ 2.2 Rodentia │ 8.│ 0.│ 4.2 Ungulata │ 5.4│ 1.2│ 3. Marsupialia │ 19.│ .6│ 5. │ │ │ Passeres │ 1.4│ 0.│ 0. Picariæ │ _6.7_│ _1.1_│ 0. Striges │ .8│ 0.│ 0. Psittaci │ 3.4│ 0.│ .1 Accipitres │ 18.3│ 4.3│ .5 Columbæ │ 2.│ 0.│ 0. Galli │ 9.3│ .7│ .7 Herodiones │ 4.1│ 0.│ 0. Anseres │ 15.7│ .6│ 1.5 ─────────────────┴─────────────────┴─────────────────┴─────────────────