Accounting theory and practice, Volume 2 (of 3) : a textbook for colleges and…
5. Crystallization[25]
747 words | Chapter 40
[25]
A. S. C. E., Vol. 31, page 220, article by R. Montfort.
A. S. C. E., Vol. 40, page 178, article by C. H. Snow.
Association Engineering Societies, Vol. 31, page 49,
by F. W. Hodgson.
U. S. Gov’t, Bureau of Entomology Bulletin #94, Pt. 1,
by T.E. Snyder.
U. S. Gov’t, Bureau of Plant Industry Bulletin #64,
by G.T. More and K.F. Kellerman.
U. S. Gov’t, Bureau of Plant Industry Bulletin #76,
by G.T. More and K.F. Kellerman.
U. S. Gov’t., Dep’t of Agriculture, Forest Service,
Circular #128 by C. S. Smith.
Losses and deterioration from these causes are quite appreciable in
some enterprises. Telephone poles are subject to attack by borers
and woodpeckers. “More than 50% of the weight of the wood may be
removed ... without being greatly manifested upon the surface.” “At
least 10% of the chestnut poles reset or replaced are injured by
insects.” Railroad trestles, bridges, docks, piers, wooden shipping,
and structures of all sorts are more or less subject to this kind of
depreciation. Minute vegetable growths known as algae may cause a
marked depreciation in a water utility. Other forms of vegetable and
animal organisms sometimes cause growths in water-pipes, resulting in
a partial shutting off of the capacity. Similarly, mineral growths may
produce like effects. Iron oxide (common rust) and lime deposits or
scale are frequent causes.
_Electrolysis._ Depreciation caused by electrolysis is a highly
technical subject, discussion of which will not be attempted here.
“Electrolysis is a chemical decomposition produced by an electric
current. As applied to utilities, electrolysis is the disintegration
of metal structure caused by the electrolytic action produced by
stray electric currents, generally from the return circuits of single
trolley electric railways.” The damage, both direct as above stated,
and indirect as in the leaking of water, gas, etc., or in the flooding
of adjacent premises or injury through gas explosions, is recognized
by the courts, but the satisfaction granted is limited to enjoining a
continuance of the injury.
_Molecular Change._ In some kinds of machinery subject to heavy strain
and shock when in use, a disintegration of the structure itself takes
place whereby its resisting power and therefore its efficiency are
greatly impaired. This condition is known as a crystallization of the
molecules.
_Depletion._ Finally depreciation due to contingent causes may be
brought about by a diminution in the supply. This is more in the nature
of a depletion charge and will be fully considered in connection with
that subject treated on page 117.
Terminable Rights
The intangible property subject to depreciation consists of terminable
or limited rights. Rights given or held for a definite period of
time expire or waste away through the lapse of time. Decrepitude
is the controlling factor here, and because of the definiteness of
the length of time, the depreciation charge is easily calculated.
Therefore provision must be made for it. Various methods, resulting in
quite different charges to each period, are sometimes employed. These
methods will be discussed in Chapters IX and X. Rights which are not
terminable or limited—and even limited rights—may, however, be given
up or abandoned. This is a situation which cannot usually be foreseen
and therefore cannot be provided against except by means of a general
reserve.
Effective Depreciation
One final point in connection with the causes of depreciation needs
consideration. Though _all_ of these various causes or kinds of
depreciation are seldom found operative on a given asset, frequently
several of them are so operative. Where this is the case their effect
is not cumulative. One or the other will prove a controlling factor in
determining the service life of the asset and thus the amount of its
periodic depreciation. There is a close relation between the operation
of the chief factors in depreciation and the scrap value of the asset.
Thus, if it is estimated that physical depreciation will be complete in
8 years, obsolescence in 10 years, and inadequacy in 12 years, scrap
value would be slight. If, however, inadequacy is the controlling
factor, becoming operative in 8 years, with obsolescence in 10 years,
and physical depreciation in 12 years, clearly scrap value might be
quite appreciable. Whichever factor is the controlling one, that factor
is said in a given case to constitute the _effective_ depreciation for
that asset. Thus, in the first case mentioned, physical depreciation
constitutes effective depreciation and would form the basis for the
estimated charge, while in the second case inadequacy is the effective
factor.
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