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 [...]

Breathing Capacity of Lungs. –the breeding capacity of the lungs bears a close correspondence to the stature of man. For an ordinary sized man of about 5′8″ in height, it will be 230 cubic inches, or about 1 gallon of air, and for each additional inch of stature up to 6 feet, there will be [...]