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Bedford Street, Covent Garden, London, 



jlj>ri/ 1872. 





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Macmillan &= Co.'s Catalogue of Works 

 in Mathematics and Physical Science; 



Pure and Applied Mathe- 

 matics; Physics, Astronomy, Geology, 

 Chemistry, Zoology, Botany; Physiology, 

 Anatomy and Medical Works generally ; 



and 



Works 



Mental and Moral 



Philosophy and Allied Subjects. 





MATHEMATICS 



Airy. — Works by G. B. Airy, Astronomer Royal : 



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ELEMENTARY TREATISE ON PARTIAL DIFFERENTIAL 



EQUATIONS. Designed for the Use of Students in the Univer- 



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sities. 



With Diagrams. 



Crown 8vo. cloth, ^s. 6d, 



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It is hoped that the fnethods of solution here explained^ and the in-' 



stances exhibited^ zvill be found sufficient for application to nearly 



all the important problems of Physical Science, which require for 



their complete investigation the aid of Partial Differential Equa- 

 tions, 



ON THE ALGEBRAICAL AND NUMERICAL THEORY OF 

 ERRORS OF OBSERVATIONS AND THE COMBINA- 

 TION OF OBSERVATIONS. Crown 8vo. cloth. 6s. 6d. 



In order to spare astronomers and observers in natural philosophy the 

 confusion and loss of time which are produced by referring to the 

 ordinary treatises embracing both branches of probabilities {the first 



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6000.4.7a 



