| The Nicol prism is made up from two prisms of calcite cemented with Canada balsam. |
| The two beams, with two different planes of polarization, are then analyzed by another Nicol prism. |
| By placing a substance between two Nicol prisms and rotating one, the angle of optical rotation could be easily measured. |
| A simple mounting consisting of a Nicol prism in a brass holder was found with the instrument and now serves as the polarizer. |
| The Nicol prism, which is made entirely of calcite, a doubly refracting mineral, isolates one beam cleanly. |
| Polarization can be verified by rotating either the Nicol prism or the Polaroid, which is between the Nicol prism and the lens in the photograph. |
