The rotational spectra of all twelve stable isotopic species of ClF, BrF, BrCl, ICl, and IBr were observed and measured in the millimeter wave region by means of a sensitive microwave spectrometer. Transitions were detected over a wide range of frequencies for molecules in both the ground vibrational state and several excited states. The rotational spectrum of each molecule was split by the nuclear quadrupole interaction. Altogether, 250 new lines were measured. These correspond to 136 pure rotational transitions. Values of the Dunham coefficients Y01, Y11, Y21, Y31, Y02, Y12, and Y03 were obtained from a computer analysis of the measured frequencies. From these coefficients a number of equilibrium constants were derived to significantly greater accuracy than in previous work. In particular, the equilibrium distance, re, was found to two or three more significant figures.

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I wish to examine certain aspects of Barth's development of special ethics which are puzzling to me, and which I believe pose difficulties that mitigate considerably the possibility of a successfully completed programme in theological ethics. Whether these aspects are puzzling to others remains to be seen. At any rate, an important part of theological ethics, as I see it, lies in seeing what sorts of responses are engendered by taking up a position and attempting to elaborate it.

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