Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Experiments and observations upon the circulation in the snapping turtle, Chelonura serpentina: with especial reference to the pressure of the blood in the arteries and veins
Experiments and observations upon the circulation in the snapping turtle, Chelonura serpentina: with especial reference to the pressure of the blood in the arteries and veins