Glasgow is not only famous for its multifarious applications of water in its finely divided gaseous form of steam, but it has made admirable use of that element in its more familiar and fluid form, as shown in the gigantic undertaking of bringing a water-supply into this thriving and populous city. The peaceful waters of a Highland lake are suddenly turned from their quiet resting-place, where they have remained in peace for generations, the admiration of all beholders, and made to take an active part in contributing to the health, wealth, and comfort of Glasgow. The beautiful Loch Katrine has been brought into the city, furnishing a stream of pure water to minister to the wants of all classes of the people--an undertaking which a few years ago would have been pronounced impossible; but here again science and art have prevailed, and brought about this all-important object and greatly desired and inestimable boon. The great capital of England itself cannot boast of such an advantage, and must still be content to drink water contaminated with impurities. Does not this speak volumes for the wealth and energy of Glasgow? What so conducive to health and cleanliness (and cleanliness is akin to godliness) as a pure and perfect supply of water such as you now possess; and you have great reason to be grateful for this beneficent application of science and art. With a worldwide celebrity for your waterworks, you have cause also to be proud of your chemical works, and that famous chimney of St. Rollox, one of the loftiest structures in the world. There are few cities more highly favoured than this. Would not Captain Shaw be glad if, in London, he had the head or command of water such as you have from Loch Katrine to save the great metropolis from the destruction by fire that they are in daily dread of? In Glasgow we hardly want this--our grand Loch Katrine does it all.