M&D - pp 107-108 Inversion Layers

[Mark Kohut]

A--and, what you say and as far back as 40 years ago now...

On Sun, Feb 22, 2015 at 3:36 PM, jochen stremmel <jstremmel at gmail.com> wrote:
> This only as an aside, about the depth the author did his research into - 20
> years ago when he had to rely on actual books - if he wanted build a short
> sentence like There inverted among the Wires, all but flowing.
>
> A-and you may not care if one star or planet is inverted, but with a
> constellation that might be different - and hanging there over St. Helena
> more than 200 years ago so much better to see.
>
> 2015-02-22 20:21 GMT+01:00 Monte Davis <montedavis49 at gmail.com>:
>>
>> Wires: http://en.wikipedia.org/wiki/Reticle
>>
>> The eye is much better at identifying "contact" between a point (of light
>> for a star, of shadow for Venus crossing the face of the sun) or shadow) and
>> a line -- or better yet the crossing of two lines -- than at judging "the
>> point is centered in the disc of vision."
>>
>> All convex lenses (including those in your eyes) invert the image.
>> Opticians figured out quickly how to re-invert it with an extra lens, a
>> prism, or a mirror -- but as every bit of glass absorbs and distorts to some
>> extent, astronomers generally did (and still do) without that. In the
>> absence of a horizon or other features of everyday vision correlated with
>> gravity and body movement, who cares if a star or planet is inverted?
>>
>> On Sun, Feb 22, 2015 at 1:46 PM, Mark Kohut <mark.kohut at gmail.com> wrote:
>>>
>>>
>>> https://books.google.com/books?id=0utHAAAAIAAJ&pg=PA115&dq=wires+to+measure+stars&hl=en&sa=X&ei=DCLqVO-3G4iegwTskYDYCg&ved=0CE0Q6AEwCA#v=onepage&q=wires%20to%20measure%20stars&f=false
>>>
>>> Seems they did refer to 'wires' with(in) (or outside of) telescopes to
>>> measure stars. And, the telescope until some later time
>>> seemed to invert the image to viewers.
>>>
>>> Also, re Yellow Dog...another of those loosely--goosey associations, a
>>> later century layer of different resonance on Yellow Dog....it is a
>>> long time phrase to apply to hard-core Democratic voters in these
>>> United States....."a yellow dog democrat"....
>>> came about somehow when the dems were for unions.....as Alice---were
>>> art thou, Alice?---was always saying: It's about work (too).
>>>
>>> On Sat, Feb 21, 2015 at 6:52 PM, David Ewers <dsewers at comcast.net> wrote:
>>> >
>>> > Here in St. Helena we have the Yellow dog as constellation...and The
>>> > Southern Cross?   Loosey-goosey... <<
>>> >
>>> >
>>> > Sorry.  Zenith star, not constellation.  But you got my point, I
>>> > reckon....<<<
>>> >
>>> >
>>> > On third thought, I'm liking Becky's idea of the wires as imaginary
>>> > constellation lines, and the Yellow Dog as constellation... (could
>>> > still be
>>> > something to the telescope lens or mirror idea, though... or maybe the
>>> > inverted image suggests that St. helena itself is reversed or upside
>>> > down,
>>> > or underneath?)
>>> >
>>> >
>>> >
>>> > On Feb 21, 2015, at 1:41 PM Jolly good day we are having,
>>> > <kelber at mindspring.com> <kelber at mindspring.com> wrote:
>>> >
>>> > And, of course, there's the yellow-dog contract, which amounts to a
>>> > forced
>>> > acquiescence to bad treatment:
>>> >
>>> > http://en.wikipedia.org/wiki/Yellow-dog_contract
>>> >
>>> > In keeping with the pretense of offering the right for slaves to become
>>> > "free planters," while, in fact, keeping them firmly enslaved (as per
>>> > the
>>> > reference Becky gives below).
>>> >
>>> > Laura (checking back in after a regrettable absence)
>>> >
>>> >
>>> >
>>> > Yes!  More odious deals!
>>> -
>>> Pynchon-l / http://www.waste.org/mail/?list=pynchon-l
>>
>>
>
-
Pynchon-l / http://www.waste.org/mail/?list=pynchon-l