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

NEW YORK:
H. BAILLIÈRE, 2 90 BROADWAY.

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

1857.

MADRID:

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

"", II. TINSON, Printer and Stereotyper, 43 Centre Street

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CHAPTER I.

ON THE DETECTION OF ARSENIC,

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

derations.

§ 4-7. First Case-8 45. Tests for Arsenious Acid-$ 6. For Fly-powder

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

$ 8-35. Second Case-$ 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 Mursh~$ 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.

§ 36-38. Third Case—$ 36. The Process of Woehler and Von Siebold.

$ 39–52. Other Methods for the Detection of Arsenic in Medico-legal Cases-

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

Hirsch-$41. Method of Graham—$ 42. Method of Danger and Flandin

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

-$ 46. Method of Valentine Rose~$ 49-50. Method of Berzelius—$ 51.

Modification by Duflos and Hirsch—$ 52. Method of Reinsch.
8 53. Difficulties arising from the Administration of Sesquioxide of Iron as

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

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