2. Due to the poor scan quality of the original, text was found to be missing at some places. Most prominent were the missing periods which have been added for the sake of clarity. Also few missing punctuation marks like commas, quotes, etc. have been added where obvious need was felt. Apart from that, some missing text has also been added after verification from other sources.
3. The following misprints have been corrected:
"Ned" corrected to "Neb" (page 13)
"cruciferae" corrected to "cruciferæ" (page 25)
"thoughfully" corrected to "thoughtfully" (page 182)
"pronouced" corrected to "pronounced" (page 199)
"resoved" corrected to "resolved" (page 205)
4. Other than the corrections listed above, printer's inconsistencies in spelling, punctuation and hyphenation have been retained.