X.—DESTRUCTIVENESS.
The rat's bite, and especially that of old rats, is very poisonous, and its teeth are finely adapted for severe, quick, sharp, and deep cutting. It forms an urgent natural necessity for them, owing to the peculiar structure and growth of their teeth, to keep them incessantly working. The idea never comes to the rats of a possible breaking off of their tusks in attacking such flexible objects as bricks or lead, and the writer has seen cases in which the rats cheerfully went to work gnawing off corners of bricks and granite, in a persistent manner, so that they could make an opening large enough for their admission into a house. Nothing is exempt from their merciless teeth. They mutilate the woodwork on the valuable drawing-room chair just as readily as they would the dingiest, most plebeian sort of washtub, and they make sad havoc of upholstery of all kinds. They seem to have an especially lasting grudge against the transmission of knowledge, for books are gnawed and mutilated by them in immense quantities. They gnaw paper, from legal documents of the highest value (and many an important writing has been hopelessly destroyed by their agency), to the most worthless treatise on "Four-Fingered Mike; or, The Terror of Hoboken." Our clothing, shoes, hat-gear, etc., is turned out by the rats in a pitifully dilapidated condition. They also eat into lead pipes for the purpose of obtaining water, which it is hard for them to do without, although we have found that they can be without food for a much greater length of time. When the rats are pressed for drink on board ship, they lay low in the day-time, but in the evening they stealthily come out on the deck from the hold, in a long row, single file, in order to sip the moisture from the rigging.
By examining the Fire Marshal's Report of New York City from 1868 to 1882, we learn that rats have been the cause of 79 fires during 12 years, making an average of five fires a year. This is on account of the rats' strong propensity for nibbling matches. In the same report is a warning against the loose and careless manner in which matches are left in pantries and closets infested by rats and mice with a fondness for this kind of diet. The great attraction for the rodents in the matches is the phosphorus, which these useful articles contain in abundance, and which the rats are able to scent out from a great distance.