on the latter for the NASS conference in Victoria
BC in June.
Regards, Roger Bailey
*From:* Peter Mayer peter.ma...@adelaide.edu.au
*Sent:* Sunday, March 29, 2015 3:13 PM
*To:* sundial@uni-koeln.de
*Subject:* Clouding the issue
Hi,
In the Last Word section of a recent _New Scientist_
--- Original Message ---
From: Fred Sawyer fwsaw...@gmail.com
Sent: 30 March 2015 13:38
To: Roger Bailey rtbai...@telus.net
Cc: Sundial Mailing List sundial@uni-koeln.de
Subject: Re: Clouding the issue
See Wheatstone's Polarizing Sundial by Jim Mahaffey in The Compendium
8(2):1-3, Jun 2001
--- Original Message ---
From: Fred Sawyer fwsaw...@gmail.com
Sent: 30 March 2015 13:38
To: Roger Bailey rtbai...@telus.net
Cc: Sundial Mailing List sundial@uni-koeln.de
Subject: Re: Clouding the issue
See Wheatstone's Polarizing Sundial by Jim Mahaffey in The Compendium
8(2):1-3, Jun 2001
March 2015 5:24 p.m.
To: peter.ma...@adelaide.edu.au; sundial@uni-koeln.de
Subject: Re: Clouding the issue
Hello Peter and all,
Yes, clouds are a significant, perhaps the overwhelming issue with sundials.
Night knocks out half the time and clouds at least half of the remaining
daylight hours. Our
That is an excellent question! I have seen this photo before, and never
noticed the numbers running twice in a semicircle. I, too, am perplexed.
I read about this dial in Hester Higton's book Sundials at Greenwich.
The dial operates on two successive polarizations of light - the first
being
working on the latter for the NASS conference in Victoria BC in June.
Regards, Roger Bailey
From: Peter Mayer
Sent: Sunday, March 29, 2015 3:13 PM
To: sundial@uni-koeln.de
Subject: Clouding the issue
Hi,
In the Last Word section of a recent _New Scientist_ Stephen Parish
raised the question
Hi,
In the Last Word section of a recent _New Scientist_ Stephen
Parish raised the question of sundials that might work on cloudy
days...Clearly, polarisation is possible, but I'm doubtful about shadow
casting...
Clouding the issue
* 18 March 2015
* Magazine issue 3013 http
