On 19/04/2014 14:40, Tony Moss wrote:
I can't help adding that as youngsters we painted
designs on paper using a strong saltpetre in a continuous line
with a paper toy pistol 'cap' at the end of the trail. When
thoroughly dried and ignited at the s
27;bang' on completion. Happy days!
Tony M.
-Original Message-
From: Douglas Bateman
To: jmikes...@ntlworld.com
CC: lmcda...@lmceng.com; bro...@pacific.net; sundial@uni-koeln.de; Tony Moss
Sent: Sat, 19 Apr 2014 11:34
Subject: Re: Design of Cards for Campbell Stokes Sunshi
There's a very full and well-illustrated description of the Campbell Stokes
sunshine recorder, with a reproduction of the "equinoctial card" in
"Handbook of Meteorological Instruments", HMSO 1956, reprinted 1961.
This tells us, inter alia, that the cards are made from good quality paste
board, not
Doug,
You’re right - my memory is failing.
See: http://www.wikihow.com/Make-Fireproof-Paper
Mike
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I think Mike may have the wrong information. I can speak from personal
(teenage) experience of making very good fireworks and soaking paper in
saltpetre solution for the touch paper, which will then smoulder nicely.
Saltpetre is one of the essential ingredients in gunpowder.
I suspect that ther
The fireproofing is saltpetre if I remember correctly.
Mike Shaw
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https://lists.uni-koeln.de/mailman/lis
Hi Brooke,
The cards have to be impregnated with a fireproofing solution
or a mini bonfire may result.
Tony Moss
-Original Message-
From: Larry McDavid
To: Brooke Clarke ; Sundial Reflector
Sent: Sat, 19 Apr 2014 2:02
Subject: Re: Design of Cards for Campbell
Brooke, I have a C-S sunshine recorder with slots in the arms for insert
cards; the slots allow inserting the cards in two N-S positions. I have,
I believe, two types of cards to fit my slots. I don't remember what
each card type is meant for, however. The glass spherical ball is about
92 mm di
