During the past year notable progress was made in several laboratories on design for linear accelerators in the energy range up to and above 1 Bev. Interest in linacs for this energy centers on two possible applications: first, as injectors for 300 to 1000 Bev synchrotrons, and second, as sources of intense meson beams. To review this progress, a conference jointly sponsored by the Brookhaven National Laboratory and Yale University was held at Brookhaven during the week of August 20, 1962.

The author presents a literature review of the clinical and experimental investigations into hypertension and phenomena associated with high blood pressure. The author discusses the topics of heredity, angiotensin-aldosterone system, vascular reactivity, ionic gradient and blood pressure, morphological changes, the kidney, sodium, the nervous system, catecholamines, the adrenal cortex, thyroid, antidiuertic hormone, ions other than sodium, obesity, aging, and atherosclerosis and their potential roles in hypertension. The author concludes that while far from understanding hypertension completely, several metabolic abnormalities have been discovered to be associated with hypertension and even play a "causal" role. He suggests that we should look much earlier in the life history of a hypertensive for etiological factors and subtle metabolic abnormalities than we do today.

This report, presented at the annual meeting of the Gerontological Society on November 10, 1961, expands on the research of Becquerel and Curies radioactive isotopes in medicine.