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Thanks to Bill's instructions (by private mail) I was able to "re-
create" a usable bubble. Obviously it is still enough fluid in the
system after 65 years or so. I am of course keen to learn how the
sextant is disassembled (and vice versa). One day I will need that
knowledge.

Thank you to the Ken and Alex advising as well.

Werner

On 9 Apr., 06:14,  wrote:
> Thanks for help from Alex Eremenko in translating parts of the handbook for 
the Russian IMS 3 octant. The fluid used in this aircraft octant was 
definitely refined ethyl alchohol (the same sort of alcohol that is used as a 
social lubricant). As it is clearly derived from the Plath SOLD octant, the 
latter almost certainly used alcohol too. I will try to post instructions and 
pictures to describe how to remove the bubble assembly and refill it on my 
blog (www.sextantbook.com) sometime in the next few days.
>
> Bill Morris
> Pukenui
> New Zealand
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