| 1. | Canada balsam was also commonly used for making permanent microscope slides.
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| 2. | The layers of glass were bonded together by Canada balsam.
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| 3. | Another important application of Canada balsam is in the construction of the Nicol prism.
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| 4. | Canada balsam is placed between the two layers.
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| 5. | Canada balsam was traditionally used for this purpose.
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| 6. | Canada balsam is amorphous when dried.
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| 7. | Canada balsam and Balsam of Peru are often used to increase flow and improve mixing properties.
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| 8. | Based on petrol, it was also significantly easier and less expensive to produce than Canada Balsam.
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| 9. | The refractive index for Canada balsam is in between the refractive index for the ordinary and extraordinary rays.
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| 10. | Traditionally Canada balsam was used as the cement in assembling these prisms, but this has largely been replaced by synthetic polymers.
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