Newton ; see page 79, note

4. du côté opposé, in the opposite direction, to the opposite side.

5. phosphène, phosphene, from Greek words meaning "light" and "to show."

6. qui n'a éprouvé ; in expressing négation pas may be omitted in rhetorical questions introduced by qui.

Page 137. — 1. a fait dire à quelques physiologistes, has caused some physiologists to say.

Page 139. — 1. M. Giraud-Teulon (1816-1887), a French physician, born at La Rochelle in southwestern France. He is the author of works on medicine and the theory of vision.