Vienna began to be lighted in the year 1687. The lights were hung out in the evening on a signal given by the fire-bell. In 1704 lamps were introduced; but at first the light which they afforded was very imperfect, as the lamps burned badly, and because, to save the expense of lamp-lighters, every housekeeper was obliged daily to remove the empty lamps, to carry them to the lamp-office to be filled, and to light them again on a signal given with a bell. In 1776, the lamps, which before amounted to 2000, were increased to 3000, and a contract was entered into for lighting them at the rate of 30,000 florins. These lamps were invented by counsellor Sonnenfels, and amounted in 1779 to 3445. They are made of white glass, in a globular form, and have a covering of tin-plate, painted red on the outside and polished within. They are supported by lamp-irons, fixed in the houses at the height of fifteen feet from the earth. Each lantern is only sixteen paces distant from the other, so that the streets are completely illuminated. They are kept lighted both summer and winter, whether the moon shines or not; and this is more necessary at Vienna than anywhere else, on account of the height of the houses and the narrowness and crookedness of the streets. The lamp-lighters wear an uniform, and are under military discipline. In 1783 the yearly expense of the lamps was estimated at only 17,000 florins[454]. Leipzig was lighted in 1702, and Dresden in 1705. In 1766, the number of lamps at the latter amounted only to 728, for the lighting of which oil of rape-seed was employed. In Cassel the streets began to be lighted under the Landgrave Charles, in 1721; but as regulations were not made sufficient to support this improvement, it was at length dropped. It was however revived in 1748, and in 1778 the number of the lamps was increased to 1013, besides those at the landgrave’s palace. Hanover was lighted in 1696, Halle in 1728, and Göttingen in 1735. Brunswick since 1765 has had 1565 lamps. Zurich has been lighted since 1778, but the lamps are very few in number. [Such was the state of street-lighting towards the end of the last century, and many of the readers of this work will remember the round glass lamps and their dismal oil-light, which long after the streets of London were illuminated with gas, still continued to be employed in the outskirts of this immense metropolis. How changed is all this now, and how surprising must it appear, that a thing so simple as the employment of the combustible gases produced in the distillation of coal and other bodies of organic origin should date from so recent a period! But such is the case with most of the improvements which tend to the comfort and happiness of the human race; slow and by degrees they progress towards perfection,--a fact most admirably illustrated by numerous articles contained in these volumes.