Josiah Willard Gibhs. 201 



to learn wliat may be regarded as known, what is guessed at, 

 what a proof is, and how far it goes. Although he disregarded 

 many of the shibboleths of the mathematical rigorists, his logi- 

 cal processes were really of the most severe type ; in power of 

 deduction, of generalization, in insight into hidden relations, 

 in critical acumen, utter lack of prejudice, and in the philo- 

 sophical breadth of his view of the object and aim of physics, 

 he has probably had no superiors in the history of the science ; 

 and no student could come in contact with this serene and 

 impartial mind without feeling profoundly its influence in all 

 his future studies of nature. 



In his personal character the same great qualities were appar- 

 ent. Unassuming in manner, genial and kindly in his inter- 

 course with his fellow-men, never showing impatience or 

 irritation, devoid of personal ambition of the baser sort or of 

 the slightest desire to exalt himself, he went far toward realiz- 

 ing the ideal of the unselfish. Christian gentleman. In the 

 minds of those who knew him, the greatness of his intellectual 

 achievements will never overshadow the beauty and dignity of 

 his life. 



Henry A. Bumstead, 



Bibliography. 



[Taken, with additions, from "Bibliographies of the present officers of Yale 

 University, 1893."] 



1873. Graphical methods in the thermodynamics of fluids. Trans. Conn. 

 Acad., vol. ii, pp. 309-342. 



A method of geometrical representation of the thermodynamic proper- 

 ties of substances by means of surfaces. Ibid., pp. 382-404. 



1875-1878. On the equilibrium of heterogeneous substances. Ibid. , vol. iii, 

 pp. 108-248 ; pp. 343-524. Abstract, this Journal (3), vol. xvi, pp. 

 441-458. 

 • (A German translation of the three preceding papers by W. Ostwald 

 has been published under the title, " Thermodynamische Studien," 

 Leipzig, 1892 ; also a French translation of the first part of the Equi- 

 librium of Heterogeneous Substances by H. Le Chatelier under the 

 title, " Equilibre des Systemes Chimiques," Paris, 1899.) 



1879. On the fundamental formulae of dynamics. Amer. Jour. Math. , vol. 

 ii, pp. 49-64. 



On the vapor-densities of peroxide of nitrogen, formic acid, acetic 

 acid, and perchloride of phosphorus. This Journal (3), vol. xviii, pp. 

 277-293 ; pp. 371-387. 



1881 and 1884. Elements of vector analysis arranged for the use of students 

 in physics. New Haven, 8°, pp. 1-36 in 1881, and pp. 37-83 in 1884. 

 (Not published.) 



1882-1883. Notes on the electromagnetic theory of light. I. On double 

 refraction and the dispersion of colors in perfectly transparent media. 

 This Journal (3), vol. xxiii, pp. 262-275. II. On double refraction in 

 perfectly transparent media which exhibit the phenomena of circular 

 polarization. Ibid., pp. 460-476. III. On the general equations of 

 mono-chromatic light in media of every degree of transparency. Ibid. , 

 vol. XXV, pp. 107-118. 



