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A diborane gas handling system has been constructed for the purposes of boronizing TFTR. Numerous safety features have been incorporated to mitigate the toxic and inflammable nature of diborane, including many features adopted from the semiconductor industry. The carborane films deposited in TFTR have significantly improved the operational performance of the machine.

2 The results of experimentation conducted at the Great 'Western Agricultural Experiment Station (3)3 indicated the need for a statistical method of interpretation of plant-count data obtained from variable-dosage experiments. It was proposed that a suitable statistical method existed which would allow pre­ dictions and practical recommendations to be made from vari­ able-dosage data, particularly when small differences were ex­ pected. The probit analysis method was examined as a possible tool for the interpretation of dosage-response relationships in weed control. Heretofore, the direct method of variance analysis was applied to variable-dosage data with reservations regarding the validity of the interpretations.