English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

(1) IN the last few years considerable interest has been aroused in the use of radiant heating for warming schools, offices, factories and other buildings, and it has come to be felt that the traditional methods of determining the warmth of a room are not entirely satisfactory. The deficiencies became evident in the course of the investigations carried out by the Building Research Station and by the Industrial Health Research Board. A joint Committee of the Medical Research Council and the Department of Scientific and Industrial Research was therefore set up to review the physical criteria, physiological considerations and nomenclature involved, and to examine the possibility of adopting standard terminologies and methods of measurement. This Committee has issued an interim report, a summary of which is published in the Report of the Building Research Board for the year 1931, and expressed the view that it is possible that some instrument might be used to give a correction-factor, for radiation effects, of readings taken with the katathermometer of the cooling power of an environment and that, in spite of the complication, this aspect merits further development. The Committee recommended that eupatheoscope readings should be taken as a basis for comparison of readings taken with such combinations of instruments. It may be remarked here that the eupatheoscope is a physical instrument designed to measure and record a quantity analogous to the physiological sensation induced by a cool environment. The instrument is essentially a black-painted cylinder at 75° F., the loss of heat from which is recorded and scaled in degrees of equivalent temperature, the equivalent temperature of an environment being defined as that temperature of a uniform enclosure in which, in still air, a sizable black body at 75° F. would lose heat at the same rate as in the environment. (2) It appears that a correction for the excessive convection-loss of a kata-thermometer can be achieved by the use of a second kata-thermometer with a surface of different emissivity, and a pair of special kata-thermometers

The Use of Kata-Thermometers for the Measurement of Equivalent Temperature