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Differential and Integral Calculus ; ' and another on the ' Geometry 

 of Curves/ In 1834 he published his 'History of Natural Philo- 

 sophy,' and in 1841 the * Undulatory Theory of Light; 1 besides 

 which he was the author of several papers in the 'Philosophical 

 Transactions ' on Light, Heat, and Irradiation. Moreover, his tracts 

 appear ( in the records of this [the Astronomical] Society, the Ash- 

 molean collections, and the volumes of the British Association. In 

 the other order of his writings we have to enumerate besides 

 those for the elucidation of pure religion the ' Connexion of Natural 

 and Divine Truth/ 1838 ; the ' Unity of Worlds/ 1855 ; ' Christianity 

 without Judaism/ 1857; on the 'Study of the Evidences of 

 Christianity/ 1860, c. 



" During the last years of his life Mr. Powell was a controversial 

 theologian. His writings were of a cast which is called liberal by all, 

 but by some in one sense, by some in another. The freedom of his 

 criticism could not but provoke strong attack from his opponents. 

 Of the controversy this Society can take no cognisance, but it must 

 be remarked, as a mere matter of biography, that in his assault upon 

 some modes of theological thought, to which the University once 

 appeared unalterably given, Mr. Powell seems to have been as much 

 of a precursor as in his efforts to stimulate science. The last of 

 his writings appears as one of seven ' Essays and Reviews/ most of 

 his colleagues being Oxford men ; and the whole of this work, which 

 is in its fourth edition, shows that Oxford names of no mean note 

 are now pledged to admit that freedom of examination which brought 

 so much assault upon the isolated individual who first used it while 

 actually connected with the University. Every meeting of educated 

 men will contain those of the most opposite views as to his con- 

 clusions ; but all will admire the fearless manner in which, without 

 reference to his own interests, he spoke out the conclusions of his 

 mind. 



"In the year 1850 Baden Powell was appointed one of the 

 Government Committee of inquiry into the studies enjoined in Oxford ; 

 he being well known as an ardent educational reformer, a fact pretty 

 well evinced in his tract on ' State Education/ considered with refer- 

 ence to 'prevalent misconceptions on religious grounds/ In 1854 

 he was selected, at Aberdeen, one of the three judges to award the 

 valuable Theological Burnett Prizes in that city. Nor was the range 



