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Transcriber's Note

Obvious typographical errors have been corrected. See the detailed
list below.

page 018--typo fixed: changed 'Oregan' to 'Oregon'
page 027--fixed: changed 'Michigian' to 'Michigan'
page 046--typo fixed: changed 'resistence' to 'resistance'
page 058--typo fixed: changed 'homus' to 'humus'
page 069--typo fixed: changed 'resistence' to 'resistance'
page 074--typo fixed: changed 'ilicijolia' to 'ilicifolia'
page 084--typo fixed: changed 'Novia Scota' to 'Nova Scotia'
page 086--typo fixed: changed 'visable' to 'visible'
page 103--typo fixed: changed 'energed' to 'emerged'
page