Author's Catalogue. 263 
WEED, W. H. 
The nickel deposits of Sohland, Saxony. Eng. Min. Jour., Mar. 3, 
1904.) 
WILLISTON, S. W. 
The relationships and habits of the Mosasaurs. (Jour. Geol., vol. 
17, pp. 43-51. Jan.-Feb., 1904.) 
WILLMOTT, A. B. 
The contact of the Archean and post-Archean in the region of the 
great lakes. (Jour. Geol., vol. 17, pp. 40-42, Jan.-Feb., 1904.) 
WHITE, CHAS. H. 
* The Appalachian river versus a Tertiary Trans-Appalachian river 
in- eastern Tennessee. (Jour. Geol., vol. 17, pp. 34-39, Jan.-Feb., 
1904.) 
WILLIS, BAILEY (and GEO. O. SMITH). 
Contributions to the geology of Washington, U. S. G. S., Prof. 
Pap. No. 19, pp. 101, 20 plates, 1903. 
WILSON, A. W. G. 
The theory of the formation of sedimentary deposits. A deductive 
study in geology and its application. (Can. Rec. Sci., vol. 9, pp. 112- 
133, 1903.) 
WILSON, E. B. 
The theory of ore-deposits. (Mines and Minerals, vol. 24, Mar., 
1904, p. 386, Continued.) 
WORTMAN, J. L. 
Studies of Eocene mammalia in the Marsh Collection, Peabody 
Museum. (Am. Jour. Sci., vol. 17, pp. 203-215, Mar. 1904.) 
WEED, W. H. 
Original native gold in igneous rocks. (Eng. Min. Jour., vol. 77, 
p. 440, Mar. 27, 1904.) 
OBALSKI, T. 
Note on mineral containing radium in the province of Quebec. 
(Eng. Min. Jour., vol. 77, p. 441, Mar. 17, 1904.) 
CORRESPONDENCE. 
Dr. Karl A. von Zittel. It is with great sorrow that I have 
learned of the death of my friend and employer Dr. Karl A. von Zittel 
of the Paleontological Museum of Munich. I had the high honor to 
be his collector in the fossil fields of Kansas and Texas for five seasons, 
and our relations were such that I shall always respect and honor his 
memory. As I Jearly love the animals of the past and have devoted 
my life to making collections of them, I ought to understand the heart 
of that great German, and I can say from personal experience of him. 
that I never knew a man who filled my ideal of what a paleontologist 
should be, as did Dr. Zittel. Absolutely unselfish, and giving the col- 
lector his just dues under nil conditions, honoring me by giving full 
