Contends that the equations of electromagnetism, whether in rationalized or non-rationalized form, express an invariant set of physical relationships. The relationships among corresponding symbols are given and applied to precise statements about the relation between the oersted and the amphere per meter, the abampere and the ampere, etc.…

The paper presents applications and methods of analysis for non-linear hyperbolic partial differential equations. The paper is concluded by an account of wave front analysis as applied to the piston problem of gas dynamics. (JG)

A biographical account of the life and scientific contributions of Charles Wheatstone is presented. Besides his invention of the "wheatstone bridge", Wheatstone suggested the use of rotating mirrors for measuring small time intervals and spectroscopic analysis of metals. He also invented numerous devices in electric telegraph systems and…

Considers a ball which is dropped from a height h above a flat surface and rebounds to a height rh, when r is a positive fraction less than one. The question asked is if the ball continues to fall and rebound in the same manner, how much time is required for the ball to come to rest? (RP)

Discusses the quantum theory of measurement and von Neumann's catastrophe of infinite regression." Examines three ways of escapint the von Neumann catastrophe, and suggests that the solution to the dilemma of inteterminism is a universe in which all possible outcomes of an experiment actually occur. Bibliography. (LC)

The types of pollutants associated with the process of power production are identified. A nine-point proposal is presented on the ways the increase in power demands might be achieved with the minimum threat to the environment. (PR)