Bow mounted range finder for tree stands

A bow mountable range finder for elevated tree stand use comprising a housing, an integrally formed tubular triangular chamber containing a quantity of air and liquid, means mounting said chamber in said housing, said tubular chamber including an elongated horizontal venting section having opposite end portions, a vertically extending translucent indicating section having opposite end portions, an inclined section having opposite end portions and a horizontally disposed reservoir section, respective said end portions of said venting section being connected between said reservoir and one of said end portions of said indicating section, respective said end portions of said inclined section being connected between said reservoir and the other of said end portions of said indicating section, said indicating section and said inclined section being substantially filled with liquid when said venting section and said reservoir section are disposed horizontally, a translucent graduated precalibrated scale having yard marks thereon and positionable rearwardly of said indicating section for reading the liquid level in said indicating section by an archer, means for removably securing said scale to said housing.