GENERAL SCIENCE. 863 



Powell, Baden, (cont.). An elementary Treatise on the Geometry of 

 Curves and Curved Surfaces, investigated by the application of 

 the differential and integral calculus. 8°. Oxford, 1830. 



■ The present State and future Prospects of mathematical and 



physical Studies in the University of Oxford, considered in a 

 public Lecture introductory to his usual course in Easter term 1832. 



8°. Oxford, 1832. 



A short elementary Treatise of experimental and mathematical 



Optics. 8°. Oxford, 1833. 



■ Observations for determining the Refractive Indices for the 



Standard Rays of the Solar Spectrum in various media. (Ash- 

 molean Society.) 8°. Oxford, 1836. 



— — On the Theory of Ratio and Proportion as treated by Euclid, 

 including an inquiry into the nature of quantity. (Ashmolean 

 Society.) ' 8°. Oxford, 1836. 



An historical view of the Progress of the Physical and Mathe- 

 matical Sciences, from the earliest ages to the present times. A 

 new edition. 12°. London, 1837. 



On the Nature and Evidence of the primary Laws of Motion. 



(Ashnolean Society.') 8°. Oxford, 1837. 



r- Additional Observations for determining the Refractive Indices 



for definite Rays of the Solar Spectrum in several media. ( Ash- 

 molean Society.) 8°. Oxford, 1838. 



A second Supplement to Observations for determining the 



Refractive Indices. . . . (Ashmolean Society.) 



8°. Oxford, 1839. 



A general and elementary View of the Undulatory Theory, as 



applied to the dispersion of light and some other subjects. 



8°. London, 1841. 



On the Theory of Parallel Lines. 8°. Oxford, 1842. 



■ Essays on the Spirit of the Inductive Philosophy, the Unity of 



Worlds, and the Philosophy of Creation. 8°. London, 1855. 



Powell, B. H. Baden. Handbook of the Manufactures and Arts of 

 the Punjab, forming vol. 2 to the ' Handbook of the Economic 

 Products of the Punjab.' 8°. Lahore, 1872. 



[Powell, T. (?)] Elementa Optica?, nova, facili et compendiosa 

 methodo explicata. 12°. Londini, 1651. 



Power, Henry. Experimental Philosophy, in three books, containing 

 new experiments microscopical, mercurial, magnetical. (Sub- 

 terraneous experiments or observations about Cole-Mines.) 



4°. London, 1664. 



Power, (Bev.) J. Mode of preventing the disastrous effects of Collision, 

 preceded by an enquiry into the causes of the Brighton Railway 

 accident. 4°. Cambridge, 1842. 



