Zenith sector micrometer

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Zenith sector micrometer

This topic has 10 replies, 4 voices, and was last updated 27 November 2018 at 14:36 by ega.

Viewing 11 posts - 1 through 11 (of 11 total)

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25 November 2018 at 16:41 #382295
ega
Participant
@ega
What happened to the image whose URL I pasted in?

https://www.ebay.co.uk/itm/Antique-Old-Print-Astronomical-Instruments-Zenith-Sector-Dolland-Micrometer/352498360568?hash=item52128a20f8:g:cRUAAOSwIDJb02Zq

Edited By ega on 25/11/2018 16:43:05
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25 November 2018 at 16:41 #34398
ega
Participant
@ega
The editor’s next project?
25 November 2018 at 17:25 #382300
Michael Gilligan
Participant
@michaelgilligan61133
**LINK**

https://www.ebay.co.uk/itm/Antique-Old-Print-Astronomical-Instruments-Zenith-Sector-Dolland-Micrometer/352498360568

Shorter URL will probably do …
25 November 2018 at 22:39 #382352
ega
Participant
@ega
Michael Gilligan:

Thank you. A case of buffer overflow, perhaps?
26 November 2018 at 11:37 #382389
Neil Wyatt
Moderator
@neilwyatt
Probably a case of embedding the wrong link

Funnily enough I'm currently making a pair of 3D printed 'sun compasses'. One is for a retired couple, both ex-schoolteachers, from my astronomy club who used to use simple versions for an educational activity – tracking the sun in altr and az for a schoolday. They wanted something more robust, but I didn't want to commit to a huge brass project (although it could have looked great).
26 November 2018 at 11:47 #382391
JasonB
Moderator
@jasonb
Just hope the sun is not to strong to distort the plastic or make it brittle in a few years

Edited By JasonB on 26/11/2018 11:47:30
26 November 2018 at 12:00 #382393
ega
Participant
@ega
Neil Wyatt:

Thank you for exposing this old print to the light of day! Sun compasses and sun dials would seem to be an excellent school project.

It looks as though I should have clicked the Link icon rather than the Image one; I know I am not the only member who struggles with this software and would gladly exchange the Smiley icon for a Help button. It's awkward to have to go to the website FAQs in mid-edit.

I think somebody suggested a dummy (!) thread where we could experiment rather than inflict our mistakes on other members.
26 November 2018 at 12:10 #382395
JasonB
Moderator
@jasonb
Posted by ega on 26/11/2018 12:00:15:

I think somebody suggested a dummy (!) thread where we could experiment rather than inflict our mistakes on other members.

You'll be wanting this thread then.
26 November 2018 at 13:00 #382398
Neil Wyatt
Moderator
@neilwyatt
Posted by JasonB on 26/11/2018 11:47:11:

Just hope the sun is not to strong to distort the plastic or make it brittle in a few years

Funnily enough you can get a UV stabilised filament called ASA.

And it's legal, decent, honest and truthful!

Neil
26 November 2018 at 18:08 #382447
ega
Participant
@ega
Posted by JasonB on 26/11/2018 12:10:17:

Posted by ega on 26/11/2018 12:00:15:

I think somebody suggested a dummy (!) thread where we could experiment rather than inflict our mistakes on other members.

You'll be wanting this thread then.

That was indeed the one I had in mind.

I have sent you a PM.
27 November 2018 at 14:36 #382569
ega
Participant
@ega
Neil Wyatt:

There is an interesting reference to the Vikings' use of the sun compass and other navigational aids in this BBC item:

https://www.bbc.co.uk/news/uk-scotland-46194699
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