| It would seem that the eye is but little sensitive to colours thus presented, perhaps on account of its own want of achromatism. |
| The achromatism of prisms depends upon the same principles, and it is effected in the same way as that of lenses. |
| He had maintained an interest in science and in Europe met the Italian astronomer Giovanni Amici, who was working on achromatism in microscopes. |
| As the diameter of the lens was so small in comparison with its focal length, its want of achromatism was inappreciable. |
| Leonhard Euler in 1747 had suggested that achromatism might be obtained by the combination of glass and water lenses. |
| Thus examined, the departure of the eye from achromatism appears very gross indeed. |
