The human race is exposed to danger from poisoning on every hand. These enemies to life are not only produced in the various arts in which man is engaged, but are produced in profusion by nature under various circumstances, and often under such specious guises as to render the most constant vigilance necessary to avoid injury. The materia medica also affords a long list of poisons, many of which are the most rapidly fatal of any known. Thus man is surrounded on every hand with danger to life from either direct or indirect poisoning, in addition to all the various other causes of disease to which attention has been more specially called in previous portions of this work.

In the strictest sense, a poison is any substance, which, when received into the body, occasions morbid action or disorders of the vital functions, since anything may become a poison if taken in sufficient quantity, as a person may be made sick by overeating, even of the most wholesome food. The general usage of the term, however. confines its application to such substances as when received into the body are capable of producing death or severe illness. An antidote is some substance capable of neutralizing, or favorably modifying, the injurious effects of the poison upon the system.

Plate 17. Poison Ivy - Poisonous Plants.

Plate 17. Poison Ivy - Poisonous Plants.

Plate 17. Stramonium - Poisonous Plants.

Plate 17. Stramonium - Poisonous Plants.

Plate 18. Black Hellebore - Poisonous Plants.

Plate 18. Black Hellebore - Poisonous Plants.

Plate 18. Fox-glove - Poisonous Plants.

Plate 18. Fox-glove - Poisonous Plants.

Plate 19. Fool's Parsley - Poisonous Plants.

Plate 19. Fool's Parsley - Poisonous Plants.

Plate 19. Flowers and Root of Aconite, or Wolfsbane - Poisonous Plants.

Plate 19. Flowers and Root of Aconite, or Wolfsbane - Poisonous Plants.

Plate 20. Garden Night Shade - Poisonous Plants.

Plate 20. Garden Night Shade - Poisonous Plants.

Plate 20. Indian Turnip - Poisonous Plants.

Plate 20. Indian Turnip - Poisonous Plants.

Plate 21. Henbane - Poisonous Plants.

Plate 21. Henbane - Poisonous Plants.

Plate 21. Sheep Laurel - Poisonous Plants.

Plate 21. Sheep Laurel - Poisonous Plants.

Plate 22. Yellow Jessamine. (Gelseminum) - Poisonous Plants.

Plate 22. Yellow Jessamine. (Gelseminum) - Poisonous Plants.

Plate 22. May Apple, or Mandrake - Poisonous Plants.

Plate 22. May Apple, or Mandrake - Poisonous Plants.