The old maxim, that "seeing is believing," applies perhaps nowhere
more than in dyeing. All those who have availed themselves of the
opportunity to see the method of dyeing ostrich feathers practically
executed before their eyes by the author, as described in the foregoing
pages, are satisfied of and willingly testify to its superiority over
any of the methods heretofore known, practiced and often acquired at
the cost of much money, time and trouble, and which, in many cases,
when put to the practical test, failed to give the desired results.
Yet there are probably many more disbelievers than believers in any
new method, however freely and truthfully certified to, who mistrust
the quick work of our new processes of ostrich feather dyeing, and who
would rather prefer to operate after a somewhat slow but (in their
opinion) therefore surer, older method. They shall not be disappointed
by perusing our book and in looking up something which they would want
to try in practice, and for them especially we supplement our book
with the following Appendix, containing a number of practically tested
recipes for dyeing ostrich feathers.