this context, be considered independent of the dimensions of the grains. The actual charge may be calculated if one has a measure of the capacitance of the grain. Only if the charge is strongly negative does the size of the dust grain enter significantly into the calculation of the equilibrium potential. 9. M. J. S. Belton, thesis,

It was hypothesized that entering Ist-born college students should earn higher mean scores on the Mathematics Aptitude test (MAT) and the Verbal Aptitude test (VAT) of the College Entrance Examination Board than would later borns. Data on 1,878 students entering in 1960 and 1961 were available, though only those (80% of total) coming from families of 2, 3, and 4 children entered in the study. The hypothesis held for female students on the VAT (t of 3.4S), but the corresponding t of 1.S9 favoring the higher mean score of first-born males on the VAT is not statistically significant. It is concluded that 1st borns in college may be verbally more able than later borns. In mathematical aptitude, no differences appear.

STAR, K. An experimental study of "reactive inhibition" and its relation to certain personality traits.

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