POLICE SCIENCE TECHNICAL ABSTRACTS AND NOTES.

The article presents abstracts of studies about police science. In X-Ray Diffraction Technique for Small Samples by R. K. Sorem, small samples may be obtained by scraping the desired surface area with a stylus made from a diamond point phonograph needle. The specimen is transferred to a gelatin fiber made by cutting a gelatin capsule. The adhesive, water, is kept to a minimum by touching the tip of the fiber to the edge of a drop for only small fraction of a second and then immediately rolling it in the specimen. Small powder cameras are recommended to keep the exposure to a reasonable value. Recognizing Where Arson Exists by C. W. Stickney is a very comprehensive and instructive discussion of the investigation of the cause and dynamics of fire as interpreted from the residue. In Unusual Result of Vehicle Examination by R. L. Jackson, a hit and run suspect vehicle was examined by fingerprint technicians to determine the validity of the owners story that the vehicle had been stolen. In the course of their processing, the image of the side of the victim's face was developed on the window of the car. At autopsy, parallel lines similar to rubber gaskets around windows were observed on the victim's head.