Pringsheim, who, by a series of experiments of undoubted merit, tried to establish that the emission of the line spectra of the alkali metals was invariably associated with a reduction of the metallic oxide.
The undoubted reference to Juvenal in Sidonius Apollinaris as the victim of the rage of an actor only proves that the original story from which all the varying versions of the lives are derived was generally believed before the middle of the 5th century of our era.
There are, however, anatomical and histological differences to be seen at any rate at the extremes between the undoubted nephridia of Goodrich, Meyer and Lankester, and the coelomoducts of the same authors.
Finally, apart from these more academic arguments there is an undoubted paradox in a theory which, at a moment when in whatever direction we look the best inspiration in poetry, sociology and physical science comes from the idea of the unity of the world, gives in its adhesion to pluralism on the ground of its preponderating practical value.
These new probabilities open up considerable possibilities in research with regard to the relations of the early Minoans and other Aegeans with Syria and Egypt and the undoubted fact of the resemblances of Minoan on the one hand to Syrian and Egyptian religions and funerary practices, and on the other hand to those of the Etruscans.
On the whole, the transaction, though it is too well vouched for to allow us to dismiss it as entirely fabulous, cannot take its place among the undoubted facts of history.
He moderated the lord-deputy's policy of deporting the Irish, and unlike him he paid some attention to the interests of the English settlers; moreover, again unlike Fleetwood, he appears to have held the scales evenly between the different Protestant sects, and his undoubted popularity in Ireland is attested by Clarendon.
The failure of the Italian artillery to carry out the general order of counter-preparation expressly given by Cadorna, and repeated in no less categorical terms by Capello, had an undoubted effect upon the course of the battle.
A wave of eclecticism passed over all the Greek schools in the 1st century B.C. Platonism and scepticism had left undoubted traces upon the doctrine of such a reformer as Panaetius.
But even with this limitation, the separation of the undoubted Fringillidae 1 into groups is a difficult task.