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 MAGNIFIER,

FOR DOUBLE STARS, AND DAY TELESCOPES.

Qui Visum, Vitam dat."

BY WILLIAM KITCHINER, M.D.

AUTHOR OF THE COOK'S ORACLE;

THE ART OF INVIGORATING AND PROLONGING LIFE; THE PLEASURE OF MAKING A WILL; OBSERVATIONS ON SINGING, &c. &c. AND EDITOR OF

THE LOYAL, NATIONAL, AND SEA SONGS OF ENGLAND.

LONDON:

PRINTED FOR HURST, ROBINSON, & CO. CHEAPSIDE; AND ARCHIBALD CONSTABLE AND CO. EDINBURGH.

1824.
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