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Joint Photographic Experts Group Image  |  2000-09-11  |  60KB  |  423x639  |  8-bit (256 colors)
Labels: bar | book | box | bulletin board | cabinet | case | coffee mill | crt screen | door | earth | grass | oven | refrigerator | shelf | sky | stairs | tray | windowpane
OCR: Nicot prism analyzer quartz crystal being tested The ends have be cut and with Carbor undum and cover plates glass table on have been cemented on wit pivots horizontal ba sam mounted or the or metal ring to horizontally Spot olass ta ble marh the tilt optical axis for raction the end face polari ze window glass painted black on the under side light source flasbcg glass window egolarity rotation of analvzer irregular moi ior crystal rings appearance left-hand ight-hand pical specimer quartz quartz from photograph ioht typical