Transcriber's Notes:
Book uses both pearl-ash and pearl ash; salmon-fly and salmon fly. Varied hyphenation was retained. Text also uses archaic spelling, "scissars".
Inexplicably, the pagination of this text's front matter runs i-xi, then begins again at v for the list of plates and reviews. No pages are missing however. This was retained.
Obvious punctuation errors repaired.
The remaining corrections made are indicated by dotted lines under the corrections. Scroll the mouse over the word and the original text will appear.