1. Macerals are observed under the petrographic microscope under reflected light. 2. Under the petrographic microscope it has a very high relief. 3. He was also the first scientist in Finland to use a petrographic microscope . 4. In 1926, he developed a petrographic microscope . 5. It would be glued to a slide and placed under a petrographic microscope for examination. 6. Viewing under a petrographic microscope , the crystals contains a scattering of minute bubble-like inclusions. 7. Michel-L�vy pioneered the use of birefringence to identify minerals in thin section with a petrographic microscope . 8. In optical mineralogy, a petrographic microscope and cross-polarised light are often used to view the interference pattern. 9. Related to crystal form, the quality of crystal faces is diagnostic of some minerals, especially with a petrographic microscope . 10. The "'primary features of Nile silt "', as revealed by a petrographic microscope , include:
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