Sentence:  It cannot be denied it [the chameleon] is (if not the moſt of any) a very abſtemious animall, and ſuch as by reaſon of its frigidity, paucity of <WSD>bloud</WSD>, and latitancy in the winter (about which time the obſervations are often made) will long ſubſist without a viſible ſuſtentation. 
Meaning of the word marked with <WSD> tags:  A vital liquid flowing in the bodies of many types of animals that usually conveys nutrients and oxygen. In vertebrates, it is colored red by hemoglobin, is conveyed by arteries and veins, is pumped by the heart and is usually generated in bone marrow.