Colophon
Reading edition
Availability
This eBook is produced by the Online Distributed Proofreading Team at www.pgdp.net.
Scans for this work are available from the Internet Archive (copy 1, 2).
Encoding
An advertisement at the front of the book has been moved to the end.
Revision History
2015-10-10 Started.
External References
Corrections
The following corrections have been applied to the text:
Page Source Correction
2 [Not in source] ,
17 moter motor
24 . ,
26 unbiassed unbiased
37 , .