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4 



SCIENTIFIC CATALOGUE. 



three books co7ttain a series of theorems and of problems on the la^vs 

 of motion of elementary stibstances. In the sixth and seventh, the 

 ?nechanieal constitution of molecules is investigated and deterfnined: 

 and by it the general properties of bodies are explained, 

 book treats of luminiferous ether. The ninth explains some special 

 properties of bodies. The tenth and eleventh contain a radical and 

 lengthy investigation of chemical principles and relations, which 

 may lead to practical results of high impoi^tance. The twelfth and 



Senate- 



The eighth 



last book treats of molecular masses^ distances, and pouters. 



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Boole.— Works by G. Boole, D.C.L, F.R.S., Professor 

 Mathematics in the Queen's University, Ireland : 



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Svo. cloth. 



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PROBLE-^^S -^ 



A TREATISE ON DIFFERENTIAL EQUATIONS. New and 

 revised Edition. Edited by I. Todhunter. Crown 8vo. cloth. 14^-. 



Professor Boole has endeavoured in this treatise to convey as complete 

 an account of the present state of knowledge on the subject of Dif- 

 ferential Equations, as zvas consistent with the idea of a work in- 



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S\o. cloth. 



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^ kikating the sf; • * 

 [t..:::!; of Cambrid^ 



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tended, prifnarily, for elementary instruction. The earlier sections ^ ^^^^ ^^^ ^^ 

 of each chapter contain that kind of matter which has usually been i Complete Work, i 

 thought stcitable for the beginner, while the latter ones are devoted 



remai 



either to an account of recent discovery, or the discussion of such \ . ^^I^^'^ 



deeper questions of principle as are likely to prese^tt themselves to the ,j^ ^ j_^ ^^ Jound Stf 

 reflective student in connection zvith the methods and processes of his 

 previous course. 



^ 'I Hamilton, De 1/ 



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A TREATISE ON DIFFERENTIAL EQUATIONS. Supple- '"^'^Worb by C 



V 



mentary Volume, Edited by I. Todhunter. Crown 8vo. cloth. 



%s. ed. 



This volume contains all that Professor Boole wrote for the purpose 

 of enlarging his treatise on Diferential Equations. 



THE CALCULUS OF FINITE DIFFERENCES. Crown 8vo. 

 cloth. IOJ-. 6t/. 



In this exposition of the Calculus of Finite Differences, particular 

 attention has been paid to the connection of its methods with those of 



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"^Svo. cloth. 



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Differential 



connection which in some instances in- 



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volves far more than a merely formal analogy. The work is in 

 some measure designed as a sequel to Professor Boolis Treatise on 



Differential Equations. 



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