From time to time I have been approached by young smiths who, thinking that I might be able to advise them, have asked me many intelligent questions regard ing studies suitable for smiths and forgers. This is a matter to which I have given a good deal of study and not a little labour, which has been directed more particularly to the needs of young men than to those of experience. That being so, the object of this book is, in the first place, to direct the attention of young smiths to the fact that science may be of immense value to them in their work in the smithy and forge; and; in the second place, to try to show them how it may be utilised in a thoroughly practical manner.