Sixth Division.

Page.

Eighteenth Century 378

From Newton to Dollond.

The London Society The Royal Society of London for Improving Natural Knowledge, founded in 1660. . . . . . . . . . 378

Thomas Sprat Author of the first history of the Royal Society (1667). . . . . . . . . . . . 379

Thomas Birch Historian and secretary of the Royal Society in the mid-18th century. . . . . . . . . . . . 381

Philosophical Transactions The world's first journal exclusively devoted to science. . . . . . 382

Uncertain beginnings of the Society . . . . 383

Natural sciences in England . . . . 386

External advantages of the Society . . . . . 389

Internal defects of the Society . . . . . . 390

Defects inherent in the environment and in the
times . . . . . . . . . . 398

Robert Hooke original: "Hook" . . . . . . . . . . . . 399

Isaac Newton . . . . . . . . . . . 401

Optical Lectures original: "Lectiones opticae" . . . . . . . . . . 404

Letter to the Secretary of the London Society . 404