Page 24
THE INDUSTRIAL MUSEUM
material, and we can include in a second division all those substances, such as wood, stone, gutta percha, which are convertible, chiefly by mechanical treatment, into articles of higher utilitarian value. Take as examples the difference between sheep's wool and Yorkshire broadcloth, or between the silkworm's cocoon and imperial velvet.
3. There is a third large class of substances, which are neither raw nor workable materials, but rather serve to modify both—such, for example, as the iodine and bromine which the photographer uses, the chlorine and alkalies applied by the bleacher, the colours used by the dyer, the oils employed by the leather-dresser.
Now one-half, at least, of all the ships and waggons of the world are continually occupied in transporting from point to point over the earth's surface, the raw, workable, and modifying materials of mineral, vegetable, and animal origin, on and with which our manufacturers exercise their skill. One great service, accordingly, which an Industrial Museum may render, is to enable those whom it concerns to detect and distinguish from each other, the various important raw, workable, and modifying materials with which Industrial Art works. A collection, therefore, of all the more prominent characteristic or typical utilitarian...
512038758
ANNUAL REPORT
OF THE
DIRECTOR OF THE INDUSTRIAL MUSEUM OF SCOTLAND.
505
Page Ú
Page I