It is the development of this craft in connexion with the perfecting of flint-glass that makes the 18th century the most important period in the history of English glass-making.
Agricultural products require perfecting and fitting for export.
Smooth lawns, pure springs and the open sky are necessary for perfecting the bleaching process.
In 1804 Rich went to Constantinople, where, and at Smyrna, he stayed some time, perfecting himself in Turkish.
Has been collected, but the reader must bear in mind that if improvement can be traced it cannot logically be attributed unhesitatingly to the perfecting of the machinery of speculation, whereby a larger use has been made of " futures," since many other economic changes have taken place concomitantly and they may have wrought the major effect.