Quercus Liber (Linnæus) 5 Cork 7 Origin 9 _Including the territory of growth and attempts to transplant the seed._ The Tree and Growth 12 Diseases 16 Stripping 17 Botany and Chemistry 22 _Including compression diagram._ Uses and Application 39 Substitutes 53 Manufacture 55 Raw stock. Sorting. Stopper making. Cork Disc making. Waste utilization. Extent of the Manufacturing Industry 71 Appendix 76 CORK: Its Origin and Industrial Uses QUERCUS SUBER— “CORK” The material of which this monograph treats has become of double interest because of its shrouded mystery, which has never been pierced to the extent of giving the world a complete and comprehensive story. The mysticism does not encompass its utility and general uses nor its native land, as these are well known, but is more associated with its character, composition and chemical makeup. Its uses may be traced far back into the misty past that is dim to us, but from the faint scroll of history looms up in the mind’s eye as an epoch that we may have been glad to know, and although the references are few, by carefully analyzing them we may glean somewhat of its lineage. The arcana attending it have been revealed to a few, who no doubt, through curiosity, have endeavored to penetrate its obscurity, but unfortunately have not written extensively upon the subject, instead leaving a meager memorandum of their findings. The years of its use have given very little knowledge of it to us, the reason perhaps being the lack of competition and therefore no necessity for a close scrutiny to find additional qualities to recommend it above others. And an additional mystery is that it has been in use for so many years and so little said about it. Its latent qualities have mystified those who have handled it for years, and from them we can learn very little; so it will be of interest to peruse practically all that has been written, incorporated in this treatise, with the addition of the latest investigations upon the subject. To present this in a form which will give credit to the small but authoritative references and place them in their proper order, together with other recent data, was no small task, and in presenting the total matter in concise style meant the weeding out of all extraneous language or superfluous description. In considering this material, it may be well to start with a few precursory remarks as to the etymology of the words by which it has been designated in the past and is now known, as by so doing it will convey a better understanding of the material to follow. QUERCUS LIBER (Linnæus)