



Produced by KD Weeks, Chris Curnow and the Online
Distributed Proofreading Team at http://www.pgdp.net (This
file was produced from images generously made available
by The Internet Archive)





Transcriber's Note

The title page consists of an image, which has been transcribed.

This version of the text cannot represent certain typographical effects.
Italics are delimited with the '_' character as _italic_.  There are
instances of vowels modified by macrons. These are given as, e.g.,
[=e], [=u], etc. Symbols in the form of bold figures are printed as
=T=, =V=, =Y=, etc. There is one instance of an inverted T, which
is represented as [=invertedT=]. The 'oe' ligature is given as
separate characters, that is, 'OE' or 'oe'.

For consistency, fractions are usually represented, for example,
as 2-1/2 for 21/2. In tabular data, the available Latin-1 fractions
1/4, 1/2, 3/4 were used on occasion to minimize width. Superscripted
characters are indicated using the carat '^'.

The few footnotes have been positioned following the paragraph where
their references appeared.

There are many invaluable illustrations, most without captions,
which could not be included in this version. These are almost always
referred to and described in the text. The positions of sketches
without captions are usually indicated in-line as [Illustration],
except where the reference to its position is obvious. Where there is
a caption, the illustration is positioned either before or after the
paragraph where it is referenced. Many illustrations are composite
sketches, which use numbers or letters to indicate the parts thereof.
A caption has been added indicating the number of these