One hundred and twenty-seven known fires thus arise from this single cause; and no doubt many of the twenty-five fires ascribed to the agency of cats and dogs were owing to their having thrown down boxes of matches at night--which they frequently do, and which is almost certain to produce combustion. The item "rat gnawing lucifer" reminds us to give a warning against leaving about wax lucifers where there are either rats or mice, for these vermin constantly run away with them to their holes behind the inflammable canvas, and eat the wax until they reach the phosphorus, which is ignited by the friction of their teeth. Many fires are believed to have been produced by this singular circumstance. How much, again, must lucifers have contributed to swell the large class of conflagrations whose causes are unknown! Another cause of fire, which is of recent date, is the use of naphtha in lamps--a most ignitable fluid when mixed in certain proportions with common air. "A delightful novel" figures as a proximate, if not an immediate, cause of twenty-two fires. This might be expected, but what can be the meaning of a fire caused by a high tide? When we asked Mr. Braidwood the question, he answered, "Oh! we always look out for fires when there is a high tide. They arise from the heating of lime upon the addition of water." Thus rain, we see, has caused four conflagrations, and simple overheating forty-four. The lime does no harm as long as it is merely in contact with wood, but if iron happens to be in juxtaposition with the two, it speedily becomes red-hot, and barges on the river have been sunk, by reason of their bolts and iron knees burning holes in their bottoms. Of the singular entry, "rat gnawing a gaspipe," the firemen state that it is common for rats to gnaw leaden service pipes, for the purpose, it is supposed, of getting at the water, and in this instance the gray rodent labored under a mistake, and let out the raw material of the opposite element. Intoxication is a fruitful cause of fires, especially in public houses and inns.