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That's a sexy pen! (It is a pen, isn't it...).Does it mean you can see if you're writing with a level-headed approach? The liquid inside is an oily product, I think, and so perhaps harder to break the surface tension?
You are highly very welcome! You, my friend, can call me Stuart.
Stuart that was a good observation I would not have thought of the denser oil substance in the pen.. It is a nice pen.. why do they call it a spirit pen Kind Sir?
Quote from: Karen W. on 19/07/2007 12:22:24Stuart that was a good observation I would not have thought of the denser oil substance in the pen.. It is a nice pen.. why do they call it a spirit pen Kind Sir?Originally they were for determining the sobriety of alcoholic ghosts !!
Ah, 20 questions eh? You're close with the dendrochronology bit - I'm actually studying a sort of dendroclimatology, but because I'm using annual height growth, it isn't "dendro" in the commonly used sense. My tag comes from HHGTTG "dentaurthurdent" as stated by Slartibartfast, but as I'm "Stuart", but also a "STUdent" I thought it would be appropriate. It works on so many levels!
The reason is that alcohol has a very low viscosity and a reasonably high surface tension so any bubble that forms drains down and bursts quite quickly like bubbles on very clean water. There is also not much room in the tube to get violent motion going and break up the single bubble into multiple bubbles