Presents the results of an analysis of Balmer's draft manuscripts, which revealed new and pertinent details about the genesis of the Balmer series. In particular the origin and nature of Balmer's geometrical construction for the series is described. In addition, it is shown that the Balmer series played a direct role in the formulation of the…

This essay describes how Francis Crick, ex-physicist, entered the field of biology and discovered the structure of DNA. Emphasis is upon the double helix, the sequence hypothesis, the central dogma, and the genetic code. (VW)

Discusses how physics draws upon and adds to other disciplines. Presents five reasons why physics is important and relevant to the present. (DS)

Discusses two "golden" ages in geological investigations/inquiry. The first, extending from the late eighteenth century through the early nineteenth century, established geology as a science based on naturalistic principles. The second, beginning after World War II, is characterized by advances in geological specialities and explanations…

The issue of factor indeterminacy in factor analysis has been the subject of considerable debate in recent years. The same issue was also discussed widely in the 1920s and 1930s. The history of the issue, the literature on the subject, and parallels between early and modern work are discussed. (Author/JKS)

Presents some highlights on Einstein's life and his main contributions to physics. (HM)

Describes the development of the theory of relativity of Einstein and its influence on physics and mathematics. The philosophical meaning of relativity is also discussed. (HM)

Argues for an increased emphasis on science and technology in the history curriculum. (BH)

Discusses how the celebration of the centennial of the electric lamp raises the claim of the supporters of Sir Joseph Swan in England that Swan not Edison was the first inventor of the light bulb. (HM)