The APS Journal Legacy Content is the corpus of 100 years of historical scientific research from the American Physiological Society research journals. This package goes back to the first issue of each of the APS journals including the American Journal of Physiology, first published in 1898. The full text scanned images of the printed pages are easily searchable. Downloads quickly in PDF format.

SUMMARY1. Entamoeba coli endotoxin was administered intravenously to cats and dogs.2. The changes in circulating levels of catecholamines and angiotensin following endotoxin were assayed by a continuous superfusion technique.3. The response of the dog was characterized by an immediate sustained rise in angiotensin levels and a later variable rise in catecholamine levels.4. The response of the cat was characterized by an early rise in catecholamine levels and a later rise in angiotensin levels.5. It is concluded that this species difference may reflect the relative importance of renin-angiotensin and sympatho-adrenal systems of dogs and cats, respectively.