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In order to examine the genetic variance and heritability of temperament among Chinese infants in Taiwan, a total of 62 pairs of same-sexed twin infants given birth in four major general teaching hospitals in Taipei City were studied. Based on placentation and 12 red blood cell antigens, 44 MZ and 18 DZ pairs were identified. Temperament was assessed at the age of six months by the Chinese edition of Carey's Temperament scale. Significant genetic variance was observed for activity level, approach or withdrawal, intensity of reaction, quality of mood, and threshold of responsiveness, with a heritability of 0. 64, 0.56, 0.74, 0.39, and 0.45, respectively. There was no significant intrapair difference in temperamental characteristics between monochorionic and dichorionic MZ twins.

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Introductionprocess of boundary-layer formation in twodimensional flow for the case of constant acceleration of the body has been discussed by Schlichting. l As far as the authors know, there is no published analysis which discusses the boundary-layer formation in an axially symmetrical body in constant acceleration by the method of successive approximations up to the third order. In this Note, the boundary-layer formation of an axially symmetrical body in constant accelerated motion is studied by the method of successive approximations. The second and third approximation equations are derived and calculated by numerical method. The beginning of separation of a sphere in constant accelerated motion is compared with different orders of approximation.

Sixteen new 8‐siloxyquinolines and 5‐chloro‐8‐siloxyquinolines were synthesized, Structures of all new compounds were determined by IR, NMR, MASS, and elemental analysis. The factors affecting the silylation reactions are disccussed. From the UV absorption pattern, it is shown that the (p→d)π interaction of the Si‐O bond does exist.