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OF THE 



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MA THEM A TICS. 



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study at Cambridge. They have also an interest as being the work 

 of an almost entirely self-taught mathematical genius. The Papers 

 comprise the following: — -An Essay on the application of Mathe- 

 matical Analysis to the Theories of Electricity and Magnetism 

 On the Laws of the Equilibrium of Fhdds analogous to the Electric 

 Fluid^-On the Determination of the Attractions of Ellipsoids of 

 variable Densities — On the Motion of Waves in a variable Canal 

 of small depth and tvidth — On the Reflection and Refraction of 

 Sound — On the Reflection and Refraction of Light at the Common 

 Su7face of two Non- Crystallized Media — O^t the Propagation of 

 Light in Crystallized Media — Researches on the Vibrations of Pen- 

 dulums in Fluid Media, ^' It has been for so??ie time recognized 

 that Greenes writings a7'e a^nongst the most valuable mathematical 

 productions we possess, " — Athenisum. 



Hemming.— AN ELEMENTARY TREATISE ON THE 

 DIFFERENTIAL AND INTEGRAL CALCULUS. For the 

 Use of Colleges and Schools. By G. W, Hemming, M.A., 



Fellow of St. John's College, Cambridge. Second Edition, with 

 Corrections and Additions. 8vo. cloth, g^-. 



*' There is no book in co??tmon use from which so clear and exact a 

 knowledge of the principles of the Calculus can be so readily ob- 

 tained J^ — Literary Gazette. 



\ 



Jackson.— GEOMETRICAL CONIC SECTIONS. An Ele- 

 mentary Treatise in which the Conic Sections are defined as the 

 Plane Sections of a Cone, and treated by the Method of Projections. 

 By J. Stuart Jackson, M. A , late Fellow of Gonville and Gains 



College. 



Crown 8vo. 4^". 6d, 



This work has been written with a view to give the stiident the beneflt 

 of the Alethod of Projections as applied to the Ellipse and Hyper- 

 bola, When this 77icthod is admitted info the treatment of Conic 

 Sections there are many reasons why they should be defined^ not 

 "with reference to the focus and directrix^ but according to the 

 original defi^tition from tvhich they have their naine^ as Plane 

 Sections of a Cone, This method is calculated to produce a 7naterial 

 siynplification in the treatinent of these cuT^es and to make the proof 

 of their properties more easily understood in the first instance and 

 more easily rejnejnbcTcd, It is also a powerful insti^ument in the 

 solution of a large class of problems relating to these curves. 



