e martë, 23 tetor 2007

Laplace"s hypothesis had the great advantage of starting with



an extended mass already in rotation, but it violated fatally
the law of constancy of moment of momentum
Laplace"s hypothesis had the great advantage of starting with
an extended mass already in rotation, but it violated fatally
the law of constancy of moment of momentum. We should expect
this hypothesis to create a solar system free from
irregularities, very much as if it were the product of an
instrument-maker"s precision lathe. The solar system as it
exists is a combination of regularities and many surprising
irregularities.




Stewart remarks finally on the influence of the Habits, on which he



notices the power of the mind to accommodate itself to circumstances,
and copies Paley"s observations on the _setting_ of the habits
Stewart remarks finally on the influence of the Habits, on which he
notices the power of the mind to accommodate itself to circumstances,
and copies Paley"s observations on the _setting_ of the habits.




He starts another objection:--The happiness-test is good as far as it



goes, but we also approve and disapprove of actions as they are just or
generous, or the contrary, and with no reference to happiness or
unhappiness
He starts another objection:--The happiness-test is good as far as it
goes, but we also approve and disapprove of actions as they are just or
generous, or the contrary, and with no reference to happiness or
unhappiness. In answering this argument, he confines himself to the
case of Justice. To be morally approved, a just action must in itself
be peculiarly pleasant or agreeable, irrespective of its other effects,
which are left out: for on no theory can pleasantness or agreeableness
be dissociated from moral approbation. Now, as Happiness is but a
general appellation for all the agreeable affections of our nature, and
unable to exist except in the shape of some agreeable emotion or
combinations of agreeable emotions; the just action that is morally
commendable, as giving naturally and directly a peculiar kind of
pleasure independent of any other consequences, only produces one
species of those pleasant states of mind that are ranged under the
genus happiness. The test of justice therefore coincides with the
happiness-test. But he does not mean that we are actually affected
thus, in doing just actions, nor refuse to accept justice as a
criterion of actions; only in the one case he maintains that, whatever
association may have effected, the just act must originally have been
approved for the sake of its consequences, and, in the other, that
justice is a criterion, because proved over and over again to be a most
beneficial principle.




It was at the Oeningen quarries, in the eighteenth century,



that a wonderful vertebrate fossil, some four feet long, was
discovered
It was at the Oeningen quarries, in the eighteenth century,
that a wonderful vertebrate fossil, some four feet long, was
discovered. A writer of that period, Scheuchzer, announced it
as Homo diluvii testis, a man witness of the deluge! Cuvier
knew better, and was able to demonstrate its relationship to
the giant salamanders of Eastern Asia and North America. It
forms, in fact, a distinct genus of Cryptobranchidae, which
Tschudi, apparently mindful of the early error, named Andrias;
though the proper name of the animal appears to be
Proteocordylus scheuchzeri (Holl.). The stone at Wangen was
used for building purposes, and at one time there were three or
four quarries actively worked. In earlier times the larger
fossils naturally attracted most attention, fishes, snakes,
turtles, fresh-water clams and a variety of leaves and fruits.
Such specimens were saved, and were sold and distributed to
many museums. The supply was good, yet at times not sufficient
for the market; so the monks at Oeningen, and others, would
carve artificial fossils out of the soft rock, coating them
with a brown stain prepared from unripe walnut shells. In later
years, during the middle part of the nineteenth century, the
period of Darwin, the great importance and interest of the
fossil beds came to be better appreciated. Dr. Oswald Heer,
professor at Zurich, an accomplished botanist and entomologist,
did perhaps nine tenths of the work, describing plants,
insects, arachnids and part of the Crustacea. The fishes were
described by Agassiz, and later by Winkler. The remaining
vertebrates were principally made known by E. von Meyer.