OPTICS Achromatic Lenses Teinoscope Optometer Optigraph

Description: Legend to the illustrations: OPTICS: Fig. 1. Achromatic eye-piece, with two glasses, 2. Same, with three glasses, 3. Same, with four glasses, 4. Ramsden's eye-piece, 5-8. Represent Dr. Wollaston's method of centering a triple object glass, 9-12. Represent different forms of the dichroscope, 13-14. Is the optigraph of Mr. Ramsden, as improved by Mr. T. Jones, 15. Is Dr. Brewster's teinoscope, 16-17. Represent Dr. Wollaston's instrument for measuring refractive powers, 17-18. Represent Dr. Brewster's chromatic thermometer, 20-26. Represent the principles and construction of Dr. Thomas Young's improved optometer. Print Specifics: Type of print: Copperplate engraving - original antique print Year of printing: not indicated in the print. The print came from the Edinburgh Encyclopedia published between 1808-1830 under the direction of Sir David Brewster. The last photo (not included in this offer) shows the publication schedule of individual volumes. Condition: 1-2 (1. Excellent - 2. Very good - 3. Good - 4. Fair). Light age toning of paper, darker along the edges. Light brownish spots along the edges. Please examine the photo for details. Overall Dimensions: 8 x 10.5 inches (20.5 x 26.5 cm). Paper weight: 3 (1. Thick - 2. Heavier - 3. Medium heavy - 4. Slightly heavier - 5. Thin) Reverse side: Blank Notes: 1. Green color border around the print in the photo is a contrasting background on which the print was photographed. 2. The print detail is sharper than the photo of the print. Martin2001 Satisfaction Guaranteed Policy! Any print purchased from me may be returned for any (or no) reason for a full refund including all postage. Internet seller since 1998. Five-star service.

Price: 18.7 USD

Location: Manassas, Virginia

End Time: 2025-01-19T00:23:55.000Z

Shipping Cost: 4.65 USD