14 Vene- | 0.57| 35.36 | .99 | 12.06 | 47.97 |Brown tian | | | | | | Red | | | | | | 15 Metal- | 2.59| 64.00 | .63 | 5.82 | 23.42 |Rich lic | | | | | |Brown Brown | | | | | | 16 Crimson| 0.57| 66.24 | 1.77 | 3.60 | 25.63 |Rich Oxide | | | | | |Dark | | | | | |Red 17 Red | 2.30| 80.39 | .37 | .03 | 9.63 |Medium Oxide | | | | | |Brown 18 Red | 0.57| 61.28 | .97 | 2.68 | 15.94 |Light Oxide | | | | | |Choco- | | | | | |late | | | | | |Brown 20 Red | 7.78| 46.72 | 1.70 | 7.64 | 20.38 |Dark Oxide | | | | | |Reddish | | | | | |Brown 23 Special| 0.58| 72.48 | -- | 8.80 | 4.48 |Deep French | | | | | |Choco- Oxide | | | | | |late | | | | | |Brown 24 Mica- | 2.02| 86.27 | -- | 2.04 | 9.50 |Dark ceous | | | | | |Gray Black | | | | | |Tone Oxide | | | | | | 25 Black |33.12| 57.12 | -- | 1.44 | -- |Jet Oxide | | | | | |Black 26 Red | 0.57| 84.16 | 5.00 | 2.00 | .63 |Deep Oxide | | | | | |Red 27 Special| 0.57| 38.40 | 55.62 | 2.12 | 1.53 |Medium Red | | | | | |Red 28 Oxide C| -- | 30.40 | .94 | 13.60 | 42.30 |Brown ==========+=====+===========+==========+=============+=======+========= =Analysis of Iron Oxide Pigments.= Because of the great consideration now being given to iron oxide paints, the writer secured a series of oxides widely used in this country, and has determined the most important constituents of each. =Basic Lead Chromate (American Vermilion).= By boiling white lead with chromate of soda and subsequently treating with small quantities of sulphuric acid, American vermilion, or basic lead chromate, is prepared. It contains 98% of lead compounds, frequently free chromates, and has a gravity of 6.8. The particles appear granular and large, frequently assuming a square structure.