A study of the development of commercial electron spectroscopy of chemical analysis (ESCA) instrumentation over a span of three decades is presented. The field has also been extended significantly by use of synchrotron radiation as a bright X-ray source, which has opened new areas of research in solid-state physics, molecular biology, and many…

Reactions to John Monaghan's "Computer Algebra, Instrumentation and the Anthropological Approach" focus on a variety of issues related to the ergonomic approach (instrumentation) and anthropological approach to mathematical activity and practice. These include uses of the term technique; several possibilities for integration of the two approaches;…

This paper proposes a different experimental setup compared with the traditional ones, in order to determine the acceleration of gravity, which is carried out by using a fluid at a constant rotation. A computerized rotational system--by using a data acquisition system with specific software, a power amplifier and a rotary motion sensor--is…

Describes the desk top calculators now on the market, including manufacturers, prices, and functions performed. Provides a table of specifications for programmable desk calculators. (MLH)

This article discusses an instrument devised to provide objective and reliable information about the fundamentally time-dependent nature of observable motor performance. (Author)

Discussed and described are analytical instruments available for chemical analysis in 1940-41. (RH)

THE AIM OF THIS STUDY WAS TO IDENTIFY AND SET TONE-REGISTER BOUNDARIES, AND TO DESCRIBE TONAL CONTOURS OF SINGLE WORDS AND COUPLETS IN TERMS OF WHAT GOOD MANDARIN CHINESE SPEAKERS ACTUALLY DO. THE STUDY WAS BASED ON ISOLATED AND COUPLED WORDS OF HIGH LINGUISTIC FREQUENCY, WHICH WERE RECORDED BY 18 PROFESSORS OF MANDARIN CHINESE ON NARROW-BAND…

Manufacturers of instruments and equipment used in the measurement, control, etc., listed alphabetically under product headings. Extensive listing. (LK)