What is the position to-day. Gas, the staple product from the distillation of coal three-quarters of a century ago, now, to all intents and purposes, is the by-product. The world could roll along very comfortably without it. Indeed, we may have to do so in the near future when the gas is stripped of every other marketable constituent, leaving only a mixture of methane and hydrogen gases to be burned under boilers to raise steam for the generation of electricity in enormous bulk. The ammonia which formerly jeopardized health and lives, and to remove and to throw away which the pioneer engineers strained every nerve, is now trapped to be converted into fertilizer. Then the tar which likewise nearly drove the engineers frantic is now carefully drawn off, collected and resolved into a host of wonderful articles to furnish a diversity of indispensable materials. It would be wearisome to recite the list. It is so lengthy. But it would seem as if the by-products of coal touch every other industry, ranging from dyes to chemicals, flavourings to disinfectants, perfumes to therapeutics and soporifics. As with coal so with oil. Forty years ago the boring of a well was followed with mixed feelings by the indefatigable driller. A “strike,” while devoutly to be desired, was just as likely to bring dreadful disaster swift and sudden, even death, as wealth untold. The driller probed the earth animated by one idea. This was to tap the subterranean lake of crude petroleum. But in driving his bore the driller invariably crashed through the roof of an underground reservoir of petroleum gas. Ignorant of the value of this product, though painfully aware of its danger if allowed to break away and to get beyond control, the early seekers for oil led this gas through a pipe to a point some distance away. There the flow from the open end was ignited and the gas allowed to burn merrily in the open air. The driller knew no peace of mind until the flame flickered and expired as a result of the exhaustion of the subterranean gasometer. Then, and not until, he could resume his boring for the precious liquid with complacency. But with passing years and progress came enlightenment. The gas is no longer wasted; it is trapped. In some instances it is led through piping for hundreds of miles to feed hungry furnaces engaged in the making of steel and other products. The earth is even being drilled, not for petroleum, but for its huge supplies of natural gas, and the huge reservoirs thus discovered are being harnessed to the thousand wheels of industry. We even find trains fitted with cylinders carrying natural gas stored under high pressure to furnish light for the convenience of passengers, and to enable dainty meals to be cooked in the kitchens of the dining-cars.