This was Pall Mall in London, which was first lit by gas on the 28th of January, 1807. The introduction of gas-lighting into London is due to the zeal and unwearied patience of a German named Winsor. He managed to gain some supporters, “and,” says a writer in Chambers’s _Book of Days_, “the long line between St. James’s Palace and Cockspur Street blazed out in a burst of gas-lamps on the night in question to the no small admiration of the public.” Westminster Bridge was lit with gas for the first time on the last night of 1812. Two years later in other parts of the metropolis gas was introduced on the streets, and from that time the new mode of lighting gradually made its way all over the world. =29. How fast can one read when reading silently?= Most competitors gave an answer to this question; but why did not all? It was easy enough, because the best answer a girl could make was to record the result of experimenting on herself. It was pointed out by many with much truth that the rate of reading varies greatly with different individuals and also with the kind of book read. We cannot, for instance, read philosophy as rapidly as history, or history as fast as a work of fiction. Poetry also, says a sensible competitor, must be read slowly in order to appreciate the style and rhythm. A moderately rapid reader, says this same competitor, will read history at the rate of about 600 words in five minutes, fiction at about 2,000 words in the same time, and poetry at about 700 words. The 600 and 700 words here given appear slow compared with the 2,000; but there is all the difference in the world between reading to remember and criticise and reading merely for a pastime. =30. What famous philanthropist was known as the “Nightingale of the House of Commons?”= When a girl shoots a bow at a venture she may hit the mark, but more often she does not. Here are some of the random shots at this answer—the Earl of Shaftesbury, John Bright, Mr. Gladstone, Sir Henry Fawcett, Sir Thomas Fowell Buxton, Lord Coleridge, the Earl of Chatham, and William Pitt. No, it was none of these—it was William Wilberforce, who will always be associated with the abolition of the slave trade. His remarkably sweet voice, so often used on behalf of those unable to plead for themselves, obtained for him the name to which we have referred in our question. =31. How many hours a day should we give to sleep?=