Description

A PH. & F. PELLIN, PARIS POLARIMETER. MANY SUBSTANCES HAVE THE PROPERTY, CALLED OPTICAL ACTIVITY, OF ROTATING THE PLANE OF POLARIZATION OF THE LIGHT THAT HAS PASSED THOUGH A SAMPLE. THE AMOUNT OF ROTATION DEPENDS ON THE THICKNESS AND THE CONCENTRATION OF THE SAMPLE AND THEREFORE ONE CAN LEARN VARIOUS PROPERTIES OF A SAMPLE BY MEASUREMENTS OF ITS POLARIZATION. A POLARIMETER ENABLES ONE TO DO THAT BY THE USE OF NICOL PRISMS AT BOTH ENDS. THIS POLARIMETER HAS A GLASS TUBE ABOUT 58 CM LONG THROUGH WHICH THE POLARIZED LIGHT PASSES. AT THE OTHER END IS A POLARIZATION DETECTOR THAT IS ROTATABLE TO MEASURE THE CHANGE IN ANGLE. THE SIGNATURE READS PH & F. PELLIN PARIS. THE HEIGHT IS ADJUSTABLE. THE ANGLE SCALE RANGE IS 100�-0-100� AND IS ABOUT 28 CM IN DIAMETER.

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