Preface.

I have received so many kind expressions of approval since I delivered this Lecture in Invercargill and Dunedin that I venture to publish it, with considerable additions. It has been the result of a good deal of labour and some expense, and, as I think it is calculated to do some good, I shall ask my friends to do their best to circulate it widely in this Colony, at Home, and in Australia. I think I may also claim the support of the Dunedin Manufacturers' Association. I regret that I have been unable to publish with this edition the map and other illustrations which I used in delivering the lecture orally, as the expense would be too great. If subsequent editions are called for, shall endeavour to arrange for at least some of these being published, as they are of considerable interest and make my meaning clearer.

The Author.