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PROFESSOR OF CHEMISTRY IN THE RENSSELAER POLYTECHNIC INSTITUTE, TROY, N. Y.

NEW YORK:
H. BAILLIÈRE, 290 BROADWAY.

AND 219 REGENT STREET, LONDON.
PARIS: J. B. BAILLIÈRE ET FILS, RUE HAUTEFEUILLE.
MADRID: C. BAILLY-BAILLIÈRE, CALLE DEL PRINCIPE.

1857.

ENTERED according to Act of Congress, in the year 1857, by

C. E. BAILLIÈRE, In the Clerk's Office of the District Court of the United States, for the Southern District of New York.

W. H. TINSON, Printer and Stereotyper, 43 Centre Street

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CHAPTER I.

ON THE DETECTION OF ARSENIO,

§ 1. Statistics of Cases of Poisoning with Arsenic-$2–3. Preliminary Consi-

derations.

84–7. First Case-$45. Tests for Arsenious Acid-$ 6. For Fly-powder-

$7. For Realgar, Orpiment, and Scheele's Green.

$ 8-35. Second Casem$ 9. Destruction of the organic matter, and Solution

of the Arsenic-§ 10. Precipitation of the Arsenic as Sulphide-$ 11–15.

Collecting and purifying the Precipitate-$ 16-35. Reduction to Metallic

Arsenic—$ 16. Comparative value of the Processes of Marsh, and of Frese-

nius and Babo-$ 17-19. The Process of Marsh—$ 20. Precautions to be

observed-$ 23–24. Other modes of preparing the Test-liquid-$25. Resem-

blance of Arsenic and Antimony-$ 26–30. Distinction of the two Metals-

§ 31-32. Method of examination of the mirrors and spots obtained by the

Process of Marsh-$ 33–35. The Process of Fresenius and Babo.

$ 86–38. Third Case-$ 36. The Process of Woehler and Von Siebold.

$ 89–52. Other Methods for the Detection of Arsenic in Medico-legal Cases

8 39. Otto's former Method—$ 40. Method of Drunty, and Duflos and

Hirsch-$41. Method of Graham-$ 42. Method of Dunger and Flandin

- 43. Method of Schneider-$ 44-45. Old Methods with Caustic Potassa

- 46. Method of Valentino Rose-$ 49–50. Method of Berzelius-8 51.

Modification by Duflo8 and Hirsch—$ 52. Method of Reinsch.

8 63. Difficulties arising from the Administration of Sesquioxide of Iron as

Antidote-$ 54. List of Apparatus and Materials and Practical Remarks.

CHAPTER II.

85

ON THE DETECTION OF ANTIMONY, TIN, MERCURY, COPPER, LEAD, AND ZINC,
$ 55–58. General Remarks—$59. Destruction of the Organic Matter; Prelimi-

nary Tests—$ 60. Treatment with Sulphureted Hydrogen-$ 61. Collection
of the Precipitate, and further Treatment—$ 62. Procedure in the case of
Copper; 8 63. Lead; $ 64. Mercury ; $ 65-69. Antimony and Tin ; $ 70. Zinc;
$ 71. Examination of the Residue from the First Operation.

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