I was roughly pushed back by the German soldiers twice over. I broke through only to be repulsed again. They got into difficulties with the huge crowd, who pushed through on all sides, bought up the stock of surrounding shops, and threw chocolates and other sweets, cigars and cigarettes, at their boys. Then a bugle sounded, and the Belgians once more were arrayed in files. They calmly lighted their cigarettes, and as the order "march" was given, they took off their caps, waved them through the air, and, turning to the Lige crowd, exclaimed: "Vive la Belgique." Then hundreds of caps, hats, and arms were waved in response, the air resounding the cry: "Vive la Belgique. Au revoir! Au revoir!"
Engines operated by means of hot air, called caloric engines, and engines operated by gas, or explosive substances, all act substantially upon the same general principles as steam-engines; the greatest distinction being between those engines wherein the generation of heat is by the combustion of fuel, and those wherein heat and expansion are produced by chemical action. With the exception of a limited number of caloric or air engines, steam machinery comprises nearly all expansive engines that are employed at this day for motive-power; and it may be safely assumed that a person who has mastered the general principles of steam-engines will find no trouble in analysing and understanding any machinery acting from expansion due to heat, whether air, gas, or explosive agents be employed."Not that I am asking for sheer curiosity," she said gaily. "You see I am also in a position to throw a little light in a dark place. Do you know that the rest of the missing notes have been in my possession?"
