There was, between the toes, an epidermal growth more distinct than in the case of other peoples, though not so conspicuous as to permit of the epithet "half-webbed," much less "webbed," being applied to them.
"Wanderings Among South Sea Savages And in Borneo and the Philippines"
H. Wilfrid Walker
Speaking generally of epidermal tissue and inner tissue, Sachs remarks that "the contrast of the two is the plainer the more the part of the plant concerned is exposed to air and light."
"Essays: Scientific, Political, & Speculative, Vol. I"
Herbert Spencer
It is possible and even probable that the outer epidermal scales have a somewhat different composition to the bulk of the fibre, but whether that is the case or not is not known with any degree of certainty, this much can be asserted, that wool is not a simple definite chemical compound.
"The Dyeing of Woollen Fabrics"
Franklin Beech