2 



SCIENTIFIC CATALOGUE. 



Airy (G. B.) — coittimud. 



relating to chances zvhick can be altered only by the changes of entire 

 units or integral viidtiples of units in the fundamental conditions 

 of the problem ; the other cpncerning those chances which have 

 respect to insensible gradations in thevalueof the element 7neasured)y 

 this volume has been drawn up. It relates only to errors of observa- 

 tion^ and to the rules, derivable fi'07n the considej-ation of these 

 errors, for the co??ibination of the results of observations, 



UNDULATORY THEORY OF OPTICS. Designed for the Use 

 of Students in the University, New Edition. Crown 8vo. cloth. 

 6x, (}d. 



^^ncrf^o-Ehctn 



' ... Sections, an 

 Lm states cone 



pnSrap^^- 



Coinse 



S..A.M.> 



of Lectures dc 



The undulatory theory of optics is presented to the reader as having Ireland. By ROBERT 

 the same claims to his attention as the theory of gravitation, — namely ^ Hatliematics and Mec 



that it is certainly true, and that, by niathe^natical operations teland (Science and J 



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of general elegance, it leads to results of great interest. This theory 

 explains with accuracy a vast variety of phenomena of the most 

 complicated kind. The plan of this tract has been to include those 

 phenomena only zvhich admit of calculation, and the investigations 

 are applied only to phenofuota which actually have been observed, 



ON SOUND AND ATMOSPHERIC VIBRATIONS. With 

 the Mathematical Elements of Music. Designed for the Use of 

 Students of the University. Second Edition, revised and enlarged. 

 Crown 8vo. 9^*. 



. This volume consists of sections, which again are divided into num- 

 bered articles, on the following topics : — General recognition of the 

 air as the medium tvhich conveys sound ; Properties of the air on 

 zvhich the formation and transmission of sound depend ; Theory of 

 undulations as applied to sound, etc, ; Investigation of the motion 

 of a wave of air through the atmosphere; Transmission of zvaves 

 . of soniferous vibrations th^^ough different gases, solids, and fluids; 

 Experiments on the velocity of sound, etc, ; On musical sounds, 

 and the manner of producing them; On the elements of fnusical 

 harmony and 7nelody, and of simple musical composition ; On in- 

 strumental music; On the human organs of speech and hearing, 



A TREATISE ON MAGNETISM. Designed for the Use of 



Students in the University. Crown 8vo. gx. 6d. 



As the laivs of Magnetic Force have been experimentally examined^ 



flamt/K^s aim in ti 

 mi of tlu studefit ^ 

 snithus to produce a 

 flmmt or an int) ~ "' 

 rdhethisdesi^.,^ ffu 

 mmry. The app^ 

 'du)ne has been prm 

 ' ^mrabk system. I 

 mal utility has i' 



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