“…Several papers have been published on the electron microscope observations of the human eccrine sweat ducts (HIBBS, 1958;CHARLES, 1960;MUNGER, 1961;ZELICKSON, 1961;HASHIMOTO et al, 1965HASHIMOTO et al, , 1966bHASHIMOTO et al, , 1966cSHIBASAKI and ITO, 1967;ELLIS, 1967ELLIS, , 1968BREATHNACH, 1971). The most reliable and extensive report has, however, been that by HASHIMOTO et al (1966a) on the apocrine sweat duct; the latter has also been dealt with only briefly in studies of whole gland structures (CHARLES, 1959;MUNGER, 1965).…”