Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. N issuing the loth thousand in so short a time from the issue of the first thousand, the author feels that he need not say anything in praise of his endeavours to assist those who are anxious to secure a sound technical, as well as practical, education in this important branch of labour. He has Spared no pains to make the letterpress and plates as explicit in substance, and neat in appearance as possible in a book published at so low a price - whilst the knowledge gained, not only from theory and long study, but also from many years' of practical labour in the subjects of which the book treats, enables him to recommend it with confidence to all who are endeavouring to become theoretically or practically proficient in the work.
