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LETTER XI.

On Inoculation.

p. 73

LETTER XII.

On the Lord Bacon.

p. 83

LETTER XIII.

On Mr. Locke.

p. 94

LETTER XIV.

On Des Cartes and Sir Isaac Newton.

p. 109

LETTER XV.

On Attraction.

p. 122

LETTER XVI.

On Sir Isaac Newton's Opticks.

p. 142

LETTER