Skip to main content

Clothing Test Methods, Edited by L.H. Newburgh (Physiological Tests) and Milton Harris (Physical Tests) of Subcommittee on Clothing of the National Research Council (U.S.A.) (1945) / Chapter Skim
Currently Skimming:

Evaluation of Thermal Insulation Provided by Clothing (Belding)
Pages 9-20

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 10...
... PART I Physiological Tests
Read the entire page →
From page 12...
... Good results may be obtained by the use of a long thermocouple junction, made of 40 gauge copper-advance wire and cemented onto the thermopile junctions, after coating with duco or some other insulating material. For high temperature work at least 10 surface-temperature measurements are necessary to obtain a fair average skin temperature for the whole body.
Read the entire page →
From page 14...
... A direct calorimeter measures the total heat loss, and from this the heat loss by evaporation, E Cals/Sq.M./Hr. , obtained from the weight loss of subject plus clothing, may be subtracted to give the quantity desired.
Read the entire page →
From page 15...
... Rectum 0.59 Skin of trunk 0.09 Mouth 0.05 Skin of head 0.02 Skin of lower leg 0.07 Skin of upper arm 0.0? Skin of thigh 0.12 Skin of lower arm 0.03 If fewer temperature points are desired, the temperature of any point omitted is assumed to be midway between that of the points proximal and distal to that point, and the coefficient appropriate to the omitted point is divided equally between these two points and added to their coefficients.
Read the entire page →
From page 16...
... This is the only direct determination, to our knowledge, of the average specific heat of the whole body. It is recommended that the value of 0.83 be used for the specific heat of the body, until a further experimental determination on the whole human body suggests another value.
Read the entire page →
From page 17...
... The exact part that this recondensation plays in the thermodynamics of the insulating system is not clearly understood; it is probably small when the subject is at rest in the cold, but may be considerable under other conditions, and certainly merits further study. Alternatively EI may be approximated from a knowledge of total hoanly ventilation since we have shown that with our respiration tubes the inspired air is cooled to within a degree or two of the temperature of the cold room, and since it is known that at ambient temperature below freezing the absolute moisture content of air is very small.
Read the entire page →
From page 19...
... " • j300-10 : O ^ : u > -9 • -30 tr Z
Read the entire page →
From page 20...
... , weight of absorbed water rf Regain = -- -0 -- -- -- - -- -- -- as %. dry weight of cloth Knowing the dry weight and the regain corresponding to the reference condition, the water uptake during the experiment can be roughly divided between absorbed water and liquid water, if the clothing is made of one kind of fiber.
Read the entire page →

Key Terms

  • heat debt
  • specific heat
  • heat loss
  • average surface
  • average skin

  • moisture evaporated
  • weight loss
  • relative humidity
  • average specific
  • total heat

  • surface temperature
  • rectal temperature
  • dry weight
  • conditioned weight
  • moisture content

  • moisture loss
  • average body
  • body temperature
  • body surface
  • body tissues

  • liquid water
  • moving air
  • water uptake
  • naked subject
  • inspired air

  • serious errors
  • average temperature
  • body heat
  • lower average
  • fair average


    • This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
    More information on Chapter Skim is available.