54 PROCEEDINGS OE THE ALBANY MEETING 



His special study of the physical characters of soils began in Missis- 

 sippi with the examination of the soils and subsoils of that State with 

 the aid of a "churn elutriator^^ of his own invention. His investigations 

 of the flocculation of particles in the soils under varied conditions explain 

 many of the peculiarities of soils under cultivation. His further studies 

 in California of the soils) of arid climates, of alkaline soils, and the 

 methods of their improvement and reclamation, all go to make up a total 

 of achievement seldom attained. The combined results of these studies 

 find, expression in his great work on soils, published in 1906, his "swan 

 song/^ as he was wont to call it. 



That Hilgard was a lifelong student and an untiring worker was well 

 known to all who knew him ; to those who knew him not in person these 

 qualities are shown in the long list of published articles to his credit. 

 Such industry insures attainment of the objects proposed, which means 

 success in life. Fortunate is the man who is permitted to witness his 

 own fame ; and by such standard must we deem Hilgard fortunate, since 

 he lived to see his life work recognized and appreciated at its full worth 

 by his peers in every land. 



Bibliography ^ 



1854. Beitrage zur Kenntniss der Lichtflamme. Inaugural dissertation, Hei- 

 delberg. Ann. Chem. and Pliarm., volume XCII, page 129. 



1857. On the quantitative assay of chromium by blow-pipe processes. In full : 



Proceedings of the American Association for the Advancement of 

 Science, Montreal meeting. In abstract : American Journal of Science, 

 September. 



1858. Condition of the Geological and Agricultural Survey of the State of 



Mississippi. State report, Jackson, Mississippi. 



1859. Theory and practice. Southern Planter (Mississippi), December. 



1860. Geology and agriculture of the State of Mississippi (391 pages and 



map ) . State report, Jackson, Mississippi. 

 Specimens of soils for analysis. Southern Planter (Mississippi), Jan- 

 uary. 



1861. Soils and marls of Mississippi. Southern Planter, January 6. 

 Southern substitute for coal oil. Southern Rural Gentleman, Septem- 

 ber 14. 



Coal for winter. Southern Rural Gentleman, October 9. 



^ Prepared by Doctor Hilgard and revised and enlarged by Dr. R, H. Loughrklge. 

 I'rofessor Hilgard, deeply interested in all branches of science, was a profound thinker 

 and energetic investigator, especially in agriculture, geology, and botany, and a constant 

 contributor to scientific and other periodicals up to a short time before his death, some 

 of his articles even appearing after his death. It has been an almost impossible taslv to 

 secure a copy of each article and to complete the bibliography which he had begun, for 

 his contributions ai'e to be found in the scientific, agricultural, and other journals of 

 almost every civilized country. — R. H. L. 



