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The cover image was created by the transcriber and is dedicated to the public domain.

Transcriber Note:
Changes made by the transcriber are listed below. These changes are displayed in the text with a thin dotted gray underline.

Transcriber’s change table
pageas printedchanged to
32premanentpermanent
103augumentedaugmented
154extraordinarlyextraordinarily
196unbiassedunbiased
301indefinatelyindefinitely
327Commissoincommission
40748648n