The present book is not intended to supersede any of the works on timber hitherto published, but rather to supplement them. It has been put forward to meet a distinct want for a clearly-arranged handbook which shall contain information concerning all the timbers encountered in commerce, including those which have only of recent years appeared in the European market. The aim has been to treat the subject from its commercial, technical, and industrial aspects. In compiling this work I have adduced the practical experience of over forty years' work in the timber trade. In all cases where I have had experience of the merits and characteristic qualities of the wood, the report is based on this personal knowledge. Where I have lacked this, I have taken extracts from the most recent reports of other authorities, and I am much indebted to them for allowing me to quote from their writings. These are noted in the bibliography.