Page 6 - Jagged Edge Glass Fragment

while wearing appropriate personal protective precautions to avoid breathing dust generated by
equipment including, at a minimum, gloves and the finely ground glass samples.
eye protection. Additionally, students should take

NOTES

1. It is recommended that microscopes used be equipped with adjustable light sources and
diaphragms, as lowering the light level and closing the diaphragm will aid in analysis.

2. The optional sodium lamp or wavelength filter listed under “Other Supplies and Equipment
Required” may be utilized as a light source during microscopic examination to aid in visualization
of the Becke line.

3. Students should be advised that smaller fragments are more easily analyzed than large
fragments.

6 THE MYSTERY OF LYLE AND LOUISE