The resulting " classification is based on the examination, mostly autoptic, of a far greater number of characters than any that had preceded it; moreover, they were chosen in a different way, discernment being exercised in sifting and weighing them, so as to determine, so far as possible, the relative value of each, according as that value may vary in different groups, and not to produce a mere mechanical ` key ' after the fashion become of late years so common " (Newton's Dictionary of Birds, Introduction, p. 103).
The building had been burnt to the ground, and the guardsman began the process of sifting through the ashes.
The arches bear on the convex outer side the delicate arborescent gills, and on the concave inner side develop a membranous septum with vermicular perforations, a special sifting or filtering contrivance through which the water absorbed by the mouth has to pass before reaching the respiratory organs of the branchial apparatus.
He worked, therefore, upon more assured ground; his sifting of authorities was more thorough and his method less restricted.
That the tradition of the titles requires careful sifting is no longer doubted, and the results of recent criticism have been to confirm the view that " it is no longer possible to treat the psalms as a record of David's spiritual life through all the steps of his chequered career " (W.