Hello Claude,
Micknik developed the bifilar dial in the 1920's.
2 straight threads, parallel to an horizontal plane, were used as shadow
casters.
He named this dial a bifilar dial. Also in German the word is bifilar,
however the pronunciation is some different.
For historical reasons I think it
Dear All,
A new version of the program Zw2000 is now
available.
It has a new feature to draw date marks on (half)
analemmas as recently was asked for.
The version is numbered 1.1 , november
2000.
In the manual a paragraph for this new feature and
a figure 18 are added.
The figure 18 also
Hello Sarah,
The 2 threads or edges may be straight or curved and may have any
orientation.
As long as there are 2 shadows of which the intersectionpoint is used as the
point where to read the dial I call the dial a bifilar dial.
This is based on historical reasons as I wrote in another message.
Hello,
That is latin indeed, but the normal spelling should be :
Ora ne TE fallat hora
And the translation is :
Pray, in order the hour does not deceive you
(in french : prie , pour que l'heure ne te trompe)
Found in the french book by Boursier (out of print) : Huit cent devises de
cadrans
Hi Claude,
You wrote:
The new BSS glossary does not even list the term,
bifilar.
This is not so - it is there under dial types, and reads:
bifilar ~: invented in 1922 by Hugo Michnik in its horizontal form, although
it can be on any plane. The time is indicated by the intersection on the
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Hello John et al,
I'm still trying to come to grips with the possibilities that bifilar dials
offer. Is it necessary for the 'lines/wires/planes' that cast the shadow to
be parallel with the dial plate?
best wishes
Sarah Edmondson-Jones
