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Plate I: Vogel’s Scale of Urine Tints

Plate I: Vogel’s Scale of Urine Tints (1898)

Charles Wesley Purdy
Plate II: Sediment of Alkaline Fermentation

Plate II: Sediment of Alkaline Fermentation (1898)

Charles Wesley Purdy
Plate III: Uric-Acid Crystals (Normal Color)

Plate III: Uric-Acid Crystals (Normal Color) (1898)

Charles Wesley Purdy
Plate IV: Crystals of Phenylglucosazone

Plate IV: Crystals of Phenylglucosazone (1898)

Charles Wesley Purdy
Plate V: Uric Acid Crystals with Amorphous Urates

Plate V: Uric Acid Crystals with Amorphous Urates (1898)

Charles Wesley Purdy
Plate VI: Ammonium Urate, Showing Spherules and Thorn-Apple-Shaped Crystals

Plate VI: Ammonium Urate, Showing Spherules and Thorn-Apple-Shaped Crystals (1898)

Charles Wesley Purdy
Plate VII: Tubercle Bacilli in Urinary Sediment

Plate VII: Tubercle Bacilli in Urinary Sediment (1898)

Charles Wesley Purdy