References and Resources

“W. Lark, Practical Optician, Inventor of the Invisible and Tourmaline Spectacles,” Hardwicke’s Science Gossip: An Illustrated Medium of Interchange and Gossip for Students and Lovers of Nature 93, xcviii (1 September 1872).

E. Lommel. Experimental Physics, K. Paul, Trench, Trübner and Co. (1899).

F. Cajori. A History of Physics in Its Elementary Branches, Macmillan and Co. (1899).

The Chemist-Optician: A Survey of the Theory and Practice of Visual Optics, The Chemist and Druggist (1908).

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