Size, Shape and Location of the Heart.  –In this beautiful anatomical chart we obtain an accurate idea of the relative size, shape and position of that wonderful engine, the heart, his tireless efforts to keep the wheels of life and motion are truly surprising, and fill us with amazement at the prodigious work at daily [...]

Lung Air Cells.  — Each air cell varies in size from the seventieth to the one two-hundredth parts of an inch in diameter.  The number of aerosols in the two lungs is truly surprising, they’re been certainly not less than 600,000,000, though according to Dr. Addison’s computation there are 1,700,000,000, equivalent to 1,500 square feet [...]