at least), through the Archive. If you use the Wayback Machine
( http://archive.org ) and search for
http://www.teklab.it/utenti/vaccaro/DefaultE.htm
you will find the top level, in English. The major subpages have live
links to Archive files, and the one Bill referenced above is the first of
John,
there are two different kinds of stained glass sundials possible:
1. the sundial is made in the stained glass itself and there is a
style/gnomon on the outside. You can read this one from the outside or
from
the inside if the window is translucent enough to disguish yhe shadow from
Rereading the stuff I found I see Hans Behrendt also published about these
dials in:
Schriften der Freunde alter Uhren, Band XIX, 1980 (German)
There are 14 non UK dials and 4 UK dials described.
Photo's in black white.
Fer J. de Vries
De Zonnewijzerkring
mailto:[EMAIL PROTECTED]
The book The sun in the church Cathedrals as solar observatories by Dr.
J. L. Heilbron is available from half.com for only $9.95. Excellent value
for the technical and historical background to the meridians in the medieval
cathedrals.
Hi Dave
Here's the flawed sentence that Mac found:
A metal rod or sheet protrudes from the window on
the outside of the building and casts the sun's shadow on the sundial face
design.
If you think about it, it's a misstatement because it says that the rod
casts the sun's shadow. The rod does
Tony
Thanks for posting Larry McDavid's explanation. I now know WHY I have to us
heavy feed rates with SS.
I have just wandered into my workshop to check, and yes, I also use
Trefolex. Good stuff. It is one of the sulphonated lubricants. For a more
liquid type of lubricant, talk to the local
John and Tony,
I have had one for a couple of years (Darex Drill Doctor) and my experience
with it oscillates between joy and frustration. For some reason, I seem to
get negative relief angles too often, and despite everything I try, there is
no clear pattern as to why. However, when it does
John,
I have just checked Leadbetter's book, and the flies are flies (Order
Diptera), not dragon flies (Order Odonata, if memory serves). And if they
are to scale, some of them were pretty big! For example on Plate 10, Fig
III, the fly is half the width of a monumental cross dial, which
Title: Message
There is one excellent site on the NASS links page whichhas photographsof pinholeprojections of the sun on various meridiansduring the solar
eclipse of 1996.http://www.nauticoartiglio.lu.it/almanacco/Aa_ecli_13.ht
There used to beanother excellent page on
meridians but
