It can be concluded (under the specific experimental procedures em ployed) that: - 1) HCG labelled with 1 - 2 atoms of radioactive iodine did not differ sig nificantly from the unlabelled hormone; 2) The ovary alone exhibited a capacity to affix specifically HCG; 3) The amount of radioactive material in the ovary was directly proport ional to the quantity of labelled HCG injected; 4) When the HCG present in the circulation is bound to an antiserum to HCG, the antigen-antibody complex is not concentrated by the ovary; 5) Circulating labelled HCG decreased to 50% within 30 minutes following a single intravenous injection; 6) There are four different phases of ovarian uptake of HCG, namely: the first phase, when there is only an inflow from the circulation and stor age mainly in the follicular envelopes; the second phase, when there is a greater inflow than outflow; the third phase, when the inflow is equal to the outflow; and the fourth period, when the outflow is bigger than the in flow. REFERENCES 1. Lunenfeld, B. and Eshkol, A. Vitamins and Hormones (1967) 25:165 2. Eshkol, A. In: Recent Research on Gonadotropbio Hormones, eds. E. T. Bell andJ. A. Loraine, Edinburgh, Livingstone (1967), p. 202. 3. Eshkol, A. and Lunenfeld, B. Proc. Tel-Hashomer Hosp. (1967) 6:4. ACKNOWLEOOMEN'IS This work was supported in part by a grant from the Population Council, N. Y., U. S. A. andbyGrantNo."

The tradition of meeting together periodically at Fiesole, in Florence, by now dear to those interested in the problems of Kinins, was respected once again. This year the Symposium "Kinin 1975" was held on the 15th - 17th of July. Participation at the Symposium drew attention to the fact that 1975 was a particularly difficult year due to the delicate international economic situation as well as the time restrictions for organizing the Symposium as a satellite conference to the Sixth International Congress of Pharmacology held in Helsinki, Finland. Despite these difficulties, the "Kinin 175" Symposium was an unquestioned success, due, in great part, to the more than 40 contributors who presented their most current studies at the customary high scientific standard, presentations that provoked and stimulated considerable discussion and debate. While our family tree now includes new and active members, the presence of many members of our "Kinin" society unable to attend was missed. In particular, we mourne the death of Professor E. Werle, one of the most outstanding pioneers in the field of the kallikrein-kinin system. His friendship, participation and counsel was, and will continue to be, sorely missed by his many colleagues and students who are indebted to him for his voluminous and scientifically expert contributions continued until the very end of his most full and productive life. As in the past, the atmosphere of friendship and relaxation of the Symposium enhanced the very useful communication and exchange of ideas and information amongst the participants."

The papers collected in this volume were presented at the International Symposium on Hypotensive Peptides held in Flor ence, Italy, on October 25-29, 1965. The purpose of the meeting was to bring together scientists of fourteen countries ranging from the chemist to the surgeon, who usually do not speak a common language and for whom it would be quite difficult to follow the latest developments in fields allied to, but still some what removed from their basic interest. Their reports sum marized their recent progress and current achievements, and gave indication of the trend that future research on hypotensive peptides may take. Various aspects of the structure and function of brady kinin, kallidin, kallikrein, gastrin, eledoiSin, physalaemin, sub stance P, and related substances were discussed during the nine sessions. The first session was devoted to the chemistry of peptides. This was followed in loose order by reports dealing with the structure of some newer peptides, with kininogen, and with enzymes that release or inactivate peptides. Subsequently, reports on the physiological, pharmacological, pathological, and clinical importance of kinins, kallikrein, and eledoisin were presented. One entire session was devoted to substance P. At the closing session two motion pictures demonstrated the effect of the peptides on the circulation. The appendix of this volume contains the report of the international Committee on Nomenclature."