



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) [root] stands for the root symbol; [alpha], [beta], etc. for greek
      letters.

(6) The following typographical errors have been corrected:

    ARTICLE HYDROMECHANICS: "... and [omega] the angular velocity
      about it generated by an impulse couple M, and M' is the couple
      required to set the surrounding medium in motion..." 'impulse'
      amended from 'impluse'.

    ARTICLE HYMENOPTERA: "... see P. Cameron's British Phytophagous
      Hymenoptera (4 vols., London, Roy. Soc., 1882-1893)." 'Roy'
      amended from 'Ray'.

    ARTICLE HYRCANUS: "During its later years his reign was much
      disturbed, however, by the contentions for ascendancy which arose
      between the Pharisees and Sadducees, the two rival sects or
      parties which then for the first time (under those names at least)
      came into prominence." 'disturbed' amended from 'distrubed'.

    ARTICLE ICELAND: "Iceland is emphatically a land of proverbs