On 15 May 1862 the book was published under the full title of `` On the various contrivances by which British and foreign orchids are fertilised by insects , and on the good effects of intercrossing '' .
The book was published on 15 May 1862 under the full title `` On the various contrivances by which British and foreign orchids are fertilised by insects , and on the good effects of intercrossing '' .