819. Properties of Metallic Silver, 628, 629 820. Chloride of Silver, 629 821. Sulphide of Silver, 629 822. Preparations of Silver used in Medicine and the Arts--(1) Medicinal Preparations--(2) Silver in the Arts, 629, 630 823. Medicinal Dose of Silver Compounds, 630 824. Effects of Nitrate of Silver on Animals--Chronic Poisoning, 630, 631 825. Toxic Effects of Silver Nitrate on Man--(1) Acute--(2) Chronic Poisoning, 631, 632 826. _Post-mortem_ Appearances, 632 827. Detection and Estimation of Silver, 632, 633 5. _Mercury._ 828. The Metal Mercury--Mercurous Chloride, or Calomel, 633, 634 829. Sulphide of Mercury, 634 830. Medicinal Preparations of Mercury, 634-638 831. Mercury in the Arts--The Sulphocyanide of Mercury--Acid Solution of Nitrate of Mercury, 639 832. The more common Patent and Quack Medicines containing Mercury, 639, 640 833. Mercury in Veterinary Medicine, 640 834. Medicinal and Fatal Dose, 640, 641 835. Poisoning by Mercury--Statistics, 641 836. Effects of Mercurial Vapour and of the Non-Corrosive Compounds of Mercury--(_a_) On Vegetable Life--(_b_) On Animal Life, 641, 642 837. Effects on Man, 642, 643 838. Absorption of Mercury by the Skin, 643 839. Symptoms of Poisoning by Mercury Vapour, 643, 644 840. Mercurial Tremor, 644, 645 841. Mercuric Methide--Effects of, as Illustrated by two Cases, 645, 646 842. Effects of the Corrosive Salts of Mercury, 646, 647 843. Death from the External Use of Corrosive Sublimate, 647 844. Effects of the Nitrates of Mercury, 647 845. Case of _Reg._ v. _E. Smith_, 648 846. Mercuric Cyanide, 648 847. White Precipitate, 648 848. Treatment of Acute and Chronic Poisoning, 648 849. _Post-mortem_ Appearances--Pathological Preparations in Various Anatomical Museums, 648-650 850. Pathological Appearances from the Effects of Nitrate of Mercury,