W e describe the data analysis and report the results of the final charge-ratio experiment using the Utah cosiiiic-ray muon deiector. Values for the charge ratio were obtained from least-squares fits to the observed beniiing.ang!e disi~ibutiuns. The fitting function was the result of folding the noise scattering distribution into the ideal loc:i!-spectrum bending distribution, with the charge ratio as a parameter of the fit. This method permitted a greater precision whiie circumventing the main causes of charge-ratio dilution. We obtain the average vaiue 1.378 .t 0.015 for muon momentum at production between 1 and 8 TeV/c, corresponding to a rnzdiari primary cosnzic-ray n~ornenium range 8-61 TcV,/t, With the results of chis experiment the charge ratio IS preciseiy known over about three decades of muon energy heginning around 10 GeV. Thus, we believe the cIiarge ratio can serve as a touchstone in determiiiing the hadronic interaction dynamics and composition of :he prirr~ary cosmic rays. Already approximate agreement has been obtained with experimental results from ixedidiclinns trrilizirrg the scaling-liiniring-fs:iginet~tation hypothesis arid constant composition of thc primary cosmic rays.

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The rate has been measured for capture of negative muons on He 8 to form bound H 3 . The monoenergetic recoil triton was observed in a He 8 gas scintillation target counter, and the rate was normalized to pi-decay electrons observed in surrounding counters. Triton pulses were analyzed in the two dimensions of energy and time with respect to the stopping muon, and with an ultimate energy resolution of 15%, full width at half-maximum, a clean separation could be made between recoil tritons and other muon-associated events. The measured capture rate is 1465±67 sec"" 1 , in good agreement with other experiments and with predictions based on the "standard" theory of muon capture. Simultaneous limits were calculated for the vector and induced pseudoscalar coupling constants, gv* and gp*, using the results of this experiment and of the experiments on muon capture in liquid hydrogen. These are 0.7

The counter characteristics of a discharge tube using plane-parallel electrodes have been investigated, particularly with regard to the short time lags inherent in the streamer type of spark which occur with such a geometry at near-atmospheric pressure. Construction details for parallel-plate counters with good counter characteristics are given. Spurious counts were minimized by an argonxylene filling mixture and the use of a univibrator quench circuit. The uncertainty in the reaction time of the counters is ±5×10−9 sec.