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S.H.1826.

THE ECONOMY OF THE EYES.- PART II.

Part 1 publisked 1824 - 364.

OF

TELESCOPES;

BEING

THE RESULT OF THIRTY YEARS' EXPERIMENTS

WITH

FIFTY-ONE TELESCOPES,

OF FROM ONE TO NINE INCHES IN DIAMETER,

IN THE POSSESSION OF

WILLIAM KITCHINER, M.D.

AUTHOR OF

THE COOK'S ORACLE;

THE HOUSEKEEPER'S LEDGER;

THE ART OF INVIGORATING AND PROLONGING LIFE;
THE PLEASURE OF MAKING A WILL;

OBSERVATIONS ON SINGING, &c.; AND

EDITOR OF THE LOYAL, NATIONAL, AND SEA SONGS OF ENGLAND.

TO WHICH ARE ADDED,

An Abstract of the Practical Parts of

SIR WM. HERSCHEL'S

Writings on Telescopes and Double Stars, &c.; some Observations thereon, and Original Letters from EMINENT OPTICIANS.

LONDON:

PRINTED FOR GEO. B. WHITTAKER,

AVE-MARIA LANE.

1825.
126

Just published, in 12mo. Price 7s. Boards,

THE FIRST PART

OF

THE ECONOMY OF THE EYES:

PRECEPTS

FOR THE

IMPROVEMENT AND PRESERVATION OF THE SIGHT:

AND

PLAIN RULES,

WHICH WILL ENABLE ALL TO JUDGE EXACTLY WHEN AND WHAT

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TO

THE MOST HONOURABLE

THE MARQUESS OF SALISBURY,

MY LORD,

ETC. ETC. ETC.

Your Lordship having signified your approbation of this Treatise, and granted me permission to dedicate it to you; I avail myself of the welcome opportunity, to express the high sense I entertain of so flattering a distinction, conferred by one "whose praise is fame," and to assure you, that

I am,

My LORD,

Your Lordship's faithful Servant,

LONDON, 1825.

WM. KITCHINER.

PREFACE.

THE Author has written this " Second Part" of the ECONOMY OF THE EYES, in the same plain and circumstantial manner which he adopted in "the First Part," as he has not heard any objection against it from any Oculist or any Optician excepting One, who, when the Author requested his opinion of it, said,

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0. Why, Sir, I think that you have done exactly the contrary of what you ought to have done:-Why didn't you write in learned scientifical terms? Why, your Book will soon make all the World as Wise about Spectacles and OperaGlasses as I am Myself!"

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