THREE:One of the peculiarities of trip-hammers as machines is the mechanical difficulties in connecting them with the driving power, especially in cases where there are a number of hammers to be driven from one shaft.
THREE:I was very curious to know what had happened in Veldwezelt. When I came near the village, I noticed great activity; men, women, and children were busy with saws and hatchets cutting down all the trees and shrubs along the road.
THREE:Ink used in drawing should always be the best that can be procured; without good ink a draughtsman is continually annoyed by an imperfect working of pens, and the washing of the lines if there is shading to be done. The quality of ink can only be determined by experiment; the perfume that it contains, or tinfoil wrappers and Chinese labels, are no indication of quality; not even the price, unless it be with some first-class house. To prepare ink, I can recommend no better plan of learning than to ask some one who understands the matter. It is better to waste a little time in preparing it slowly than to be at a continual trouble with pens, which will occur if the ink is ground too rapidly or on a rough surface. To test ink, a few lines can be drawn on the margin of a sheet, noting the shade, how the ink flows from the pen, and whether the lines are sharp; after the lines have dried, cross them with a wet brush; if they wash readily, the ink is too soft; if they resist the water for a time, and then wash tardily, the ink is good. It cannot be expected that inks soluble in water can permanently resist its action after drying; [83] in fact, it is not desirable that drawing inks should do so, for in shading, outlines should be blended into the tints where the latter are deep, and this can only be effected by washing.
TWO:(1.) How may mechanical be distinguished from civil engineering?(2.) What test can be applied to determine the progress made in any branch of engineering?(3.) What are some of the conditions which prevent the use of constants in machine construction?(4.) Is mechanical engineering likely to become more exact and scientific?(5.) Name some of the principal branches of mechanical engineering.(6.) Which is the most extensive and important?
TWO:CHAPTER IV. PLATO: HIS TEACHERS AND HIS TIMES.Our passport had to be stamped by this same commander, and my colleague had to ask him for a permit to take photographs. The commander would not hear of this, but finally agreed, after my colleague had snapshotted him and his staff in front of the office. Our passport was marked: "1. Landsturm Infantry Battalion, Dresden."












