Reports of Trials for Murder by Poisoning; by Prussic Acid, Strychnia, Antimony, Arsenic, and Aconita. Including the trials of Tawell, W. Palmer, Dove, Madeline Smith, Dr. Pritchard, Smethurst, and Dr. Lamson, with chemical introduction and notes on the poisons used

CHAPTER I.

Chapter 1114 wordsPublic domain

CHEMICAL INTRODUCTION.

Summary of symptoms exhibited by various poisons: (1) Sudden death—(2) Insensibility—(3) Vomiting—(4) Action on the eye—(5) Convulsions—(6) Chronic poisoning. Alkaloids, chemically and physiologically—Processes for their detection—Necessity for keeping the extracts separate—Dragendorff’s process—Dr. Guy’s sublimation process—Effects on animals—Doubtful value of this test—Preparation and effects of reagents: (1) Mayer’s—(2) Potassium tri-iodide—(3) Sonnenschein’s test—(4) Bismuth—(5) Phosphotungstic acid—(6) Picric acid—(7) Animal charcoal—(8) Platinic chloride—(9) Tannin or Tannic acid—(10) Phospho-antimonic acid—(11) Silico-tungstic acid—(12) Auric, palladium and mercuric chlorides—Ptomaines or cadaveric alkaloids; difficulties raised by their discovery—Principles to be observed in analysing 1