Reginald Victor Jones

Record year1951

summaryIt placed error sources including optical-path convection refraction and mechanical/electrical instability into one public design analysis, and proposed implementable stabilizing measures such as shielding.

M rationaleM5.3 assesses the general precision-measurement methodological outcome directly supported by the published abstract: it goes beyond a record of a single instrument, but remains limited to error control and stability design and is not equivalent to the entire optical-measurement platform. The point value follows the outcome's scope and independent increment; absence of the original text enters only uncertainty and the unresolved portion of the attribution budget.

attribution rationaleReginald Victor Jones .43; optical-lever research and instrument-support team .1; prior optical-lever, galvanometer, and optical-amplification work .25; 1951 Physical Society paper publication chain .04; unresolved share .18. The shares are provisional research estimates.

overlap boundaryThe stability analysis in the 1951 paper of an optical lever with a photoelectric amplifier: tracing instability sources, reducing airflow-induced refractive variation with shielding, and galvanometer stability. It excludes all later optical-lever applications, unverified performance figures, wartime intelligence equipment, and the 1973 capacitance micrometer.

Evidence gapsThe original published text has not yet been obtained; the specific apparatus, supporting personnel, performance boundary, and application examples remain to be checked. No sensitivity figures are inferred from bibliographic OCR or later literature.

Record year1954、1978

summaryIt first compared mirror recoil in a medium and in air, then retested the same question at higher precision using a more stable light source and low-absorption reflecting mirrors, while openly discussing its role as empirical input on total momentum in a medium.

M rationaleThe experimental chain provides a basic-physics empirical outcome independent of the two measuring tools, and the 1978 retest improved comparability. Its scope remains experimental input in one specific controversy rather than a theoretical final settlement, so it is valued as an important family of experimental-physics outcomes.

attribution rationaleReginald Victor Jones .30; J. C. S. Richards .17; B. Leslie .17; radiation-pressure experimental support team .10; prior radiation-pressure and medium-momentum theory .18; contemporaneous Royal Society publication chain .04; unresolved share .04. The shares are provisional research estimates.

overlap boundaryIt combines the 1954 Jones–Richards experiment on light pressure in media with the 1978 Jones–Leslie high-precision retest using a laser and high-reflectance, low-absorption multilayer mirrors, plus Jones's immediately subsequent bounded theoretical discussion. It does not claim to settle the Abraham–Minkowski controversy and does not duplicate the general tool value of the 1951 optical lever or the 1973 capacitance micrometer.

Evidence gapsThe full text and complete bibliographic record of the 1954 original paper have not been obtained, so the apparatus and division of labor in the Richards stage are provisional; the 1978 abstract does not support claiming that the experiment resolved the theoretical controversy. Whether this experiment directly reused the 1951 or 1973 apparatus has not been checked item by item; the present point claims only the residual physical result.

Record year1973

summaryJones and Richards organized the design and several applications of a sensitive capacitance micrometer into a public, reusable instrument-method outcome; the specific performance and application list still await checking against the original text.

M rationaleM5.4 is provisionally assessed from the independent capacitance-measurement tool outcome under joint authorship and its historical place confirmed in scholarly reviews; its sensing principle and apparatus outcome differ from the 1951 optical error-control method. Not having read the original text does not directly reduce civilization value, but limits confidence about performance, applications, and attribution.

attribution rationaleReginald Victor Jones .25; J. C. S. Richards .25; Aberdeen capacitance-micrometry research and electronics team .1; prior capacitance-displacement measurement and bridge methods .22; 1973 Journal of Physics E publication chain .04; unresolved share .14. The shares are provisional research estimates.

overlap boundaryThe sensitive capacitance-micrometer design and bounded application account delivered in the jointly authored 1973 paper, “The Design and Some Applications of Sensitive Capacitance Micrometers.” It excludes all later capacitance sensors, unverified performance figures, the 1951 optical lever, and the results of the 1954/1978 radiation-pressure experiments.

Evidence gapsThe original paper text has not been obtained, and performance, specific applications, apparatus limits, and authors' division of labor remain unchecked. Aberdeen's contemporaneous experimental and electronic implementation personnel have not been individually identified.