FIRES--CAUSES AND PREVENTION.

It is estimated that the total annual losses of insured property by

fire, throughout the world, average nearly two hundred million dollars.

Add to this the annual destruction of uninsured property, and we should

probably have a total amounting to quite double these figures. How great

the loss, how severe the tax upon the productive industry of mankind,

this enormous yearly destruction amounts to, will come home to the minds

of most readers more directly if we call attention to the fact that it

just about equals the value of our total wheat crop during a year of

good yield. And it is a direct tax upon productive industry everywhere,

because, although here and there a nominal loser, fully insured, has

only made what is sometimes called "a good sale" to the companies

holding his risk, this is only a way of apportioning the loss whereby

the community at large become the sufferers. Thus it is that we find all

ably-managed insurance companies earnestly endeavoring to make it plain

to the public how fires should be guarded against, or most effectually

localized and controlled when once started.

During the fall, or from "lighting up" time till about New Year's day,

more fires occur ordinarily than in any other portion of the year. This

fact points to some of the most general causes of conflagrations--as in

the lighting and heating of houses, factories, etc., where this had not

been necessary during the summer months. It is also found that after the

first of the year the number of fires is greatly diminished, the

lighting and heating arrangements having been subjected to a period of

trial during which their most obvious defects would be remedied. While

it may readily be conceded that the utmost care of the owner of property

could not totally prevent great average losses from fire--for the

greater the holdings the more must the proprietor trust to the oversight

of others--it is evident that the above facts indicate the necessity of

more strenuous precautions at this season. Gas pipes and fittings should

then be tested; furnace flues and settings looked to; stove, heater, and

grate fixtures and connections examined--and in all these particulars

the scrutiny should be most closely directed to parts ordinarily covered

up or out of sight, so that any defect or weakness from long disuse may

be exposed. When to the above causes of fires we have added the

extremely fruitful one found in the extensive use of coal oil within a

few years past, we have indicated the most common sources of

conflagrations of known origin. An English authority gives the

percentages of different causes of 30,000 fires in London, from 1833 to

1865, as follows: Candles, 11.07; curtains, 9.71; flues, 7.80; gas,

7.65; sparks, 4.47; stoves, 1.67; children playing, 1.59; matches, 1.41;

smoking tobacco, 1.40, other known causes, 19.40; unknown causes, 32.88.

The foregoing figures do not give the percentage of incendiary fires,

and later statistics would, no doubt, show vastly more fires from the

use of kerosene than are here attributed to candles.

The prevention of fires, and the best means of minimizing the loss when

they do occur, are topics which cover a wide field, and a collection of

the literature on the subject would make a very respectable library. As

the question presents itself to-day, it may well be doubted whether the

general practice of large property holders of insuring all their

possessions does not tend to lessen the constant vigilance which is the

most essential requisite in preventing fires. Thousands of merchants

never mean to keep a dollar's worth of goods in store or warehouse that

is not fully covered by insurance, and they make this cost a regular

charge upon their business as peremptorily as they do the wages paid the

hands in their employ. But few manufacturers can so completely cover

their risks by insurance, yet a large portion of them do so as far as

they are able. It does not follow but that the larger portion of both

merchants and manufacturers exercise what the law will fully decide is

"due vigilance" in the care of the property so insured, but it is

evident that in most cases the thoughtfulness is much less complete--the

care wonderfully lacking in personal supervision--as compared with what

would be the case were each one his own insurer. Of course, this in no

way casts a doubt upon the general policy of business men being amply

insured, but in fact shows the greater necessity why they should be so,

that they may not suffer from the carelessness of a neighbor; it also

points to the necessity of continually increasing care and thoroughness

of inspection on the part of the insurance companies. These agencies, in

fact, must compel the insured to keep up to the mark in the introduction

of every improvement to ward off fires or diminish their

destructiveness. The progress made in this department during recent

years has been great. The almost universal use of steam has been

attended by the fitting up of factories with force pumps, hose, and all

the appliances of a modern fire brigade; dangerous rooms are metal

sheathed, and machinery likely to cause fire is surrounded by stationary

pipes from which jets of water may be turned on instantaneously from the

outside; stores and warehouses have standing pipes from which every

floor may be flooded with water under pressure, and the elevators, those

most dangerous flues for rapidly spreading a fire, are either bricked in

entirely or supposed to be closed at every floor. The latter point,

however, is sometimes forgotten, as sea captains forget to keep the

divisions of their vessels having watertight compartments separate from

one another; the open elevator enlarges a small fire as rapidly as the

open compartment allows the vessel to sink.

With the best of appliances, however, discipline and drill on the part

of the hands, in all factories, is of prime importance. It is always in

the first stages of a fire that thoroughly efficient action is

necessary, and here it is worth a thousand-fold more than can be any

efforts after a fire is once thoroughly started. Long immunity is apt to

beget a feeling of security, and the carelessness resulting from

overconfidence has been the means of destroying many valuable factories

which were amply provided with every facility for their own

preservation. The teachers in some of the public schools of New York and

Brooklyn, during the past year, set an example which some of our

millowners might profitably follow. There have been cases when, from a

sudden alarm of fire, children have been crushed in their crowding to

get out of the building. The teachers, in the instances referred to,

marched their children out, under discipline, as if there had been a

fire. Let owners of factories try some such plan as this, by which

workmen may be called upon to cope with an imaginary fire, and many of

them will, we venture to say, find means of improving their present

system or appliances for protection, elaborate as they may at present

think them to be.

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Scientific American, Volume XLIII., No. 25, December 18, 1880 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. · 第 17 / 165 题