No abstract

Presently when one uses the terms “breath analysis,” “breath testing,” or even the unqualified “chemical testing,” people, generally, think of a determination of alcohol in a specimen of breath for medicolegal purposes. (The unmodified term “alcohol” in this article refers to ethanol.) This is because of the notoriety of this application and, perhaps, the strong resentment of many to the police procedures involved. Actually, analysis of breath has been undertaken for a variety of purposes since before the recorded history of man. Thus an almost infinite number of conscious judgments about, or unconscious responses to, components of his inspired breath have been made based on odor, taste, and other sensory effects, many of these crucial for well-being or survival of both man and other animals. A striking example is the functioning of pheromones [1].

No abstract

A NUMBER of authors have published particulars concerning the oxygen content and perceiatage saturation of the blood in various vessels in the mammalian foetus. These results have been characterized by the very great divergence in the values obtained. This divergence applies even to the observations of any one observer and to any one vessel.The records have fallen into three main categories, concerned respectively with (1) the comparison of the maternal and foetal bloods, (2) the metabolism of the foetus and (3) the comparison of the foetal carotid blood with that in the umbilical vessels.

No abstract