SPHERICAL COORDINATES FOR PLOTTING THE POSITIONS OF POWDER RESIDUES

• NCJ Number: 11711
• Journal: Journal of Forensic Sciences Volume: 18 Issue: 2 Dated: (APRIL 1973) Pages: 101-109
• Author(s): C SMITH
• Date Published: 1973
• Length: 9 pages
• Corporate Author: American Soc for Testing and Materials
• Publication Format: Article
• Language: English
• Country: United States of America
• Note: PAPER PRESENTED AT 24TH ANNUAL MEETING OF THE AMERICAN ACADEMY OF FORENSIC SCIENCES, ATLANTA, 2 MARCH 1972

Annotation

METHOD FOR DETERMINING THE CONFIGURATION OF THE ENTIRE CLOUD OF POWDER RESIDUES EMITTED FROM A GUN.

Abstract

GEOGRAPHIC COORDINATES ARE APPLIED TO CLOTH SPHERES AS A REFERENCE FRAME FOR COLLECTING AND POSITIONING NITRITES EMANATING FROM A DISCHARGING FIREARM. A PROCEDURE FOR CONSTRUCTING CLOTH SPHERES OF VARYING DIMENSIONS IS DESCRIBED. TWO SUCH SPHERES OF 12 AND 36 INCH DIAMETERS, RESPECTIVELY, WERE USED TO PRESENT DATA IN TEST FIRINGS. THE USE OF THIS TECHNIQUE IN PREPARING A DETAILED DESCRIPTION OF A DISCHARGING FIREARM IS EXPLAINED. FURTHER EXPERIMENTS AND MATHEMATICAL TREATMENT OF THE DATA ARE PROPOSED. (AUTHOR ABSTRACT)