A superconducting beta spectrometer.

We have designed and constructed a superconducting beta spectrometer with a momentum resolution of about 2% and a peak solid angle of 0.5 sr. The performance of the spectrometer is described and the results of calibrations with line sources are presented.

General anesthesia: the final option.

When fear of dental treatment is so extreme as to make the options commonly available to the general dentist (such as nitrous oxide, oral medication and psychosedation) inadequate, general anesthesia may be required. Protocol for treating patients under general anesthesia are presented, as well as two cases of such treatment.