



Produced by Marius Masi, Don Kretz and the Online
Distributed Proofreading Team at http://www.pgdp.net








Transcriber's notes:

(1) Numbers following letters (without space) like C2 were originally
      printed in subscript. Letter subscripts are preceded by an
      underscore, like C_n.

(2) Characters following a carat (^) were printed in superscript.

(3) Side-notes were relocated to function as titles of their respective
      paragraphs.

(4) Macrons and breves above letters and dots below letters were not
      inserted.

(5) The following typographical errors have been corrected:

    ARTICLE BRAIN: "The cough, the eye-closure, the impulse to smile,
      all these can be suppressed." 'impulse' amended from 'impluse'.

    ARTICLE BRAIN: "The deep ends of these olfactory neurones having
      entered the central nervous organ come into contact with the of
      large neurones, called, from their