Chromium. Cr 52.1 Cobalt.  Co 59.  Columbium.[1] Cb 94. Copper. Cu 63.4 Didymium.[2] Di 142.3 Erbium.  Er 166.3 Fluorine.  F 19.  Gallium.  Ga 69.  Germanium.  Ge 72.3 Glucinum.[3] Gl 9. Gold. Au 197.3 Hydrogen. H 1.007 Indium.  In 113.7 Iodine. I 126.85 Iridium.  Ir 193.1 Iron. Fe 56.  Lanthanum.  La 138.2 Lead. Pb 206.95 Lithium. Li 7.02 Magnesium. Mg 24.3 Manganese. Mn 55. Mercury. Hg 200. Molybdenum. Mo 96.  Nickel.  Ni 58.7 Nitrogen. N 14.03 Osmium.  Os 191.7 Oxygen.[4] O 16.  Palladium.  Pd 106.6 Phosphorus. P 31.  Platinum.  Pt 195. Potassium. K 39.11 Rhodium.  Rh 103.5 Rubidium.  Rb 85.5 Ruthenium.  Ru 101.6 Samarium.  Sm 150.  Scandium.  Sc 44.  Selenium.  Se 79. Silicon. Si 28.4 Silver. Ag 107.92 Sodium. Na 23.05 Strontium.  Sr 87.6 Sulphur. S 32.06 Tantalum.  Ta 182.6 Tellurium.  Te 125.  Terbium.  Tb 159.5 Thallium.  Tl 204.18 Thorium.  Th 232.6 Tin.  Sn 119.  Titanium.  Ti 48.  Tungsten.  W 184.  Uranium.  U 239.6 Vanadium.  V 51.4 Yterbium.  Yb 173.  Yttrium.  Yt 89.1 Zinc. Zn 65.3 Zirconium.  Zr 90.6

—­Am.  Jour.  Pharm.

[Footnote 1:  Has priority over niobium.]

[Footnote 2:  Now split into neo-and praseo-didymium.]

[Footnote 3:  Has priority over beryllium.]

[Footnote 4:  Standard, or basis of the system.]

* * * * *

THE TANNING MATERIALS OF EUROPE.

The tanning materials of Europe are of an altogether different type from those of the United States.  The population is so dense that the quantity of home materials produced is not nearly proportionate to the amount consumed, and consequently they must draw upon surrounding lands for their supply.  The vegetation of these adjacent countries is of a much more tropical nature, and it naturally follows that the tanning materials are also of a different species.