196 REPORT OF NATIONAL MUSEUM, 1888. 



seum by the late Isaac Lea. In this collection, which is not yet cata- 

 logued, is a unique series of micas, which, by the terms of the will, 

 must remain intact by themselves. Among the miscellaneous minerals 

 are valuable suites of brucite, ripidolite, clinochlore, fluorite, corundum, 

 calcite, witherite, bromlite, barytocalcite, the Pennsylvania feldspars, 

 and the Phoenixville lead ores. 



Through the U. S. Geological Survey the Museum has received the 

 minerals collected at the Denver office of that organization. They in- 

 clude the type specimens of Cross and Eakin's ptilolite, the types of 

 Cross and Hillebrand's researches upon the Table Mountain zeolites and 

 the Pike's Peak fluorides, and the rare copper arsenates from Utah 

 described by Hillebrand. The survey has also contributed some fine 

 minerals collected in St. Lawrence County, New York, by Prof. S. L. 

 Penfleld, a series of wood opal collected in Montana by Dr. A. C. Peale, 

 and a number of miscellaneous speciniens from various sources. Among 

 the latter may be named a suite of the nickel silicates from Douglas 

 County, Oregon, sent to the Survey by Mr. W. Q. Brown, and some van- 

 adinites from Arizona, presented by Dr. O. Lincoln, 



During the summer and early autumn of 1887 two collecting trips were 

 made by Mr. Yeates. In his first trip he visited the iron mines of Lake 

 Champlain, the localities of Orange County, New York, the serpentine 

 deposit at Moutville, and the zinc mines of Franklin, Stirling, and 

 Ogdensburgh, New Jersey. Excellent suites of minerals were obtained 

 at all of these points, partly by direct collection, partly by gift from local 

 mineralogists. The second trip was to North Carolina, and yielded a 

 good series of quartz and corundums from Iredell and Alexander Coun- 

 ties, some fine garnets, beryls, and kyanites, and a large quantity of 

 bronzite, genthite, chromite, and samarskite. 



By purchase and exchange the additions to the collection have been 

 more in quality than in quantity. Some excellent English minerals were 

 purchased of Messrs. F. H. Butler and S. Henson, in London, having 

 been selected by myself during my visit to Great Britain. Satisfactory 

 exchanges were made with the California State Mining Bureau, and Mr. 

 C. W. Kessler, of Statesville, North Carolina. 



Gifts have been received from many sources. Our especial acknowl- 

 edgments are due to Messrs. E. E. C. Stearns, W. J. Mullins, G. F. 

 Kunz. C. W. Cunningham, W. B. Smith, H. G. Hanks, J. D. English, 

 W. P. Eowe, T. K. Bruner, Grinnell Burt, Henry Mapes, YTm. Cooper, 

 Col. P. J. Sinclair, Thomas Lewis, D. A. Bowman, C. E. Beacher, E. M. 

 Eeynolds, S. C.Young, C. S. Bement, J. A. D. Stephenson, P. O. Dwyer, 

 Otto F. Pfordte, and the Green Eiver Zircon Mining Company. 



The routine work of the department needs no special notice here, 

 having followed the lines established in previous years with no changes 

 of importance. The only researches prosecuted upon Museum material 

 are referred to in the Bibliography,* the work in each case having been 



*See section iv of the Report. 



