The Economy of the Eyes: Precepts for the Improvement and Preservation of the Sight; Plain Rules Which Will Enable All to Judge Exactly When, and What Spectacles Are Best Calculated for Their Eyes; Ob - Hardcover

Excerpt from The Economy of the Eyes: Precepts for the Improvement and Preservation of the Sight; Plain Rules Which Will Enable All to Judge Exactly When, and What Spectacles Are Best Calculated for Their Eyes; Observations on Opera Glasses and Theatres, and an Account of the Pancratic Magnif

Without spectacles* all the other work ing tools, of most Artists, soon after their 4oth year, would be almost useless.

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