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5) Tinted antiseptic solutionsallow better identification of the area of skin disinfected. They also ensure that it is immediately obvious if any solution should contaminate any part of the procedure trolley or sterile gloves; 6) Chlorhexidine in alcohol is a more effective skin antiseptic than povidone iodine. As such, it should be the agent of choice.After consulting with the lead neurosurgical, neuroanaesthetic and neurointensive care consultants at our hospital, we have decided to continue using swabsticks containing 2% chlorhexidine in 70% alcohol for skin disinfection.

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One plus one equals “10” for the members of a special arithmetic class at the University School, College of Education, Norman, Oklahoma. Of course, the members of this class were working with a number system of base two, commonly referred to as the binary system. Students also readily stated that three plus three equals “12” if the base is four. Changing the base number was not only fascinating to these highly talented fifth and sixth grade youngsters, but also provided a launching platform for the development of complicated formulas (patterns to them) which are normally developed in a second year high-school algebra course.

The following named persons have been nominated for the indicated offices in the National Council of Teachers of Mathematics by the Nominations and Elections Committee. The Committee's report was approved by the Board of Directors at its August, 1965, meeting in Vancouver, British Columbia. Biographical material and photographs of these nominees will be published in the January, 1966, issues of The Arithmetic Teacher and The Mathematics Teacher.