it is neither cheap nor more durable than otherequipment in the quality surveillance laboratory. Thislittle instrument costs about 0, and the plastic can bescratched. Be careful when it is in use or in storage.The name refractometer tells you how it works. Bythe prism on the front (fig. 3-11), light is refractedthrough the sample being tested onto the scale inside therefractometer.Figure 3-10.—Equipment in a refractometer kit.Figure 3-11.—Refractometer (top view).3-23
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