Roars. | Minerals of the Galena-Joplin Distrist. 507 
tions in position of the clay and calamine, it seems very 
probable that all the massive calamines once existed in south- 
west Missouri as ‘tallow-clay,’ precipitated from solutions. 
By filtration of waters the zinc silicate has been and is still 
eradually being removed from the ‘tallow-clays’ and crystal- 
lized as calamine. As the zine silicate is removed from the 
‘tallow-clays’ they pass to the stage called ‘joint-clays,’ 
which differs from the former only in composition.”’ 
7. 1890. On a New Variety of Zinc Sulphide from Chero- 
kee County, Kansas, Amer. Jour. Sci., XL (3), pp. 160, 
161; J. D. Robertson. A soft, white, amorphous sulphide, 
found on the Moll tract, Galena, Kan. 
8. 1890. Picropharmacolite from Joplin, Mo., being a 
part of Contributions to Mineralogy, Amer, Jour. Sci., XL 
(3), pp. 204, 205; F. A. Genty. Occurs on dolomite in in- 
crustations 2 to 15 mm. thick, composed of radiating, silky 
fibers forming botryoidal, globular or mammillary forms. 
One analysis gave the following: As,O,, 47.60; CaO, 22.42; 
MgO,6.64; H,O,23.11; total, 99.77, which corresponds to the 
formula (H,CaMg),As,0O,+6H,0. 
9. 1891. Notes on Ferrogoslarite, a New Variety of Zinc 
Sulphate, Amer Jour. Sci., XLI (3) p. 212; H. A. Wheeler. 
A zine sulphate, containing 4.90 % ferrous sulphate, occur- 
ring as yellow to brown mammillary and stalactitic incrus- 
tation on the wall of a large body of zinc blende at Webb 
City, Mo. | 
10. 1891-’92. A Revised List of Minerals, Trans. Kan. 
ACBGls Gio, BIIUL, joo. WG, 732 GC. Jel, Wembiyer evacl J, Isl. iS. 
Bailey. The following minerals from Cherokee county, Kan- 
sas, H. Haworth being the authority for many of them: Ga- 
lenite, sphalerite, greenockite, chalcopyrite, pyrite, marcasite, 
quartz, limonite, calcite, dolomite, smithsonite, cerussite, 
malachite, azurite, hydrozincite, calamine, kaolinite, barite, 
anglesite, gypsum, and goslarite. Some of these minerals 
doubtless occur in parts of Cherokee county other than those 
included in the Joplin lead and zine district. 
11. 1893. Lead and Zine Deposits of the Mississippi 
Valley ; Trans. Amer. Inst. Min. Eng., XXII, p.171; Walter 
P. Jenney. Mentions the following minerals from the dis- 
