In all our manufactories steam proves itself the motive power, and there is hardly a large work without it. This city can show its weaving, spinning, bleaching, and dyeing works--all which have tended to raise Glasgow from the small town of Watt's time to the proud position it now holds of being the first commercial city of Scotland. In this city, second only to Manchester in the production of cotton goods, it cannot fail to be interesting to state, that in the first nine months of the present year there has been exported 2,188,591,288 yards of cotton piece-goods manufactured in this country--a larger quantity by nearly 150,000,000 yards than the corresponding period of 1867, the year of the largest export of cotton manufactures ever known until then. Of course Glasgow has had its share in this great branch of export trade, rendering it large, wealthy, and populous--results which have mainly followed from the application of science to art. Last, not least, see what steam has enabled us to do in regard to the food for the mind, both in printing it and afterwards in its distribution. Look, for instance, to Printing House Square--to the "Times" newspaper. In the short space of one hour 20,000 copies are thrown off the printing-machine, and, thanks to the express train, the same day the paper can be read in Glasgow. Still further in this direction, the value of steam is also shown by its having enabled us to produce cheap literature, so strikingly instanced in the world-famed works of Sir Walter Scott, which we are now enabled to purchase at the small sum of sixpence for each volume--a result which well shows the application of science to art.