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 Post subject: Dr. Hanneman's Tips: 2 :Specific Gravity Balance
PostPosted: Tue Jan 19, 2016 12:02 am 
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One of Dr. Hanneman's most useful inventions is an ingenious device to directly read Specific Gravity. When John Le Bourgeois and I spent an afternoon with him last year I promised to post instructions to make this tool on our forum.

There are also some links for the "not so handy" to order the balance directly. Please read this pdf and feel free to discuss.
Click on the link below for full instructional article.
Construction of a Hanneman Specific Gravity Balance


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 Post subject: Re: Dr. Hanneman's Tips: 2 :Specific Gravity Balance
PostPosted: Tue Jan 19, 2016 12:23 am 
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Thanks, Barbra and D. Hanneman. Apparently a popular file - it's taking forever to download!


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 Post subject: Re: Dr. Hanneman's Tips: 2 :Specific Gravity Balance
PostPosted: Tue Jan 19, 2016 1:28 am 
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The file is a big one.


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 Post subject: Re: Dr. Hanneman's Tips: 2 :Specific Gravity Balance
PostPosted: Tue Jan 19, 2016 3:07 am 
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this and several other tools are in Dr Hanneman 's book. It is well worth the price.


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 Post subject: Re: Dr. Hanneman's Tips: 2 :Specific Gravity Balance
PostPosted: Tue Jan 19, 2016 8:44 am 
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Barbra Voltaire wrote:
The file is a big one.

Less than 50 MB. Ordinarily less than a minute. Something was dragging down the server.


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 Post subject: Re: Dr. Hanneman's Tips: 2 :Specific Gravity Balance
PostPosted: Tue Jan 19, 2016 1:39 pm 
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Humph..maybe it was a popular download.
Some interesting information, I'd recommend reading through it.

If one is interested in ordering Dr. Hanneman's Book, I sell it through my shop:
Image

But, we are intending to post his insights on this platform for all to benefit from. :D


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 Post subject: Re: Dr. Hanneman's Tips: 2 :Specific Gravity Balance
PostPosted: Tue Jan 19, 2016 2:04 pm 
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The book is definitely worthwhile. The nice thing about the PDF is that you can print parts of it and scribble on them.


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 Post subject: Re: Dr. Hanneman's Tips: 2 :Specific Gravity Balance
PostPosted: Tue Jan 19, 2016 2:14 pm 
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I've also included a couple of links on the pdf so one can actually purchase the instrument as opposed to making it from scratch. 8)


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 Post subject: Re: Dr. Hanneman's Tips: 2 :Specific Gravity Balance
PostPosted: Wed Jan 20, 2016 1:03 am 
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Hold on for just a minute. [-X :smt026

That article was written 50 years ago.

Next month, at Tucson, I will be introducing a new approach to density.
It is based on relative density, which is simpler, faster, and anyone can make themselves in a few minutes.

Keep you eyes open.
I just have to write the instrutions and I have only 10 days. :(


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 Post subject: Re: Dr. Hanneman's Tips: 2 :Specific Gravity Balance
PostPosted: Wed Jan 20, 2016 1:07 am 
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After you write them add them here.
The information was taken from Guide to Affordable Gemology...anything you would like me to edit, I will. :D


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 Post subject: Re: Dr. Hanneman's Tips: 2 :Specific Gravity Balance
PostPosted: Tue Feb 23, 2016 10:45 pm 
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Dr. Hanneman--Did you ever get this written??

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 Post subject: Re: Dr. Hanneman's Tips: 2 :Specific Gravity Balance
PostPosted: Sun Mar 13, 2016 5:07 am 
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Any update on this?


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 Post subject: Re: Dr. Hanneman's Tips: 2 :Specific Gravity Balance
PostPosted: Mon Mar 14, 2016 8:35 am 
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I think that Dr Hanneman's idea of reconfiguring a Westphal's balance into a direct reading version was a masterstroke. Whilst using a gallows on an electronic balance is likely to be at least as accurate and makes a much neater instrument, albeit not direct reading, Dr Hanneman's version has one overriding advantage, particularly in the field, namely it is not dependent on an external powersource. When one is out in the field and a spare battery a 5 hour drive away, this has to be the decider.


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 Post subject: Re: Dr. Hanneman's Tips: 2 :Specific Gravity Balance
PostPosted: Mon May 16, 2016 8:51 am 
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Bill Hanneman wrote:
Keep you eyes open.

I guess that the rest of the forum copes with the eye strain better than me....

Dr. Hanneman, please excuse the impatience but, did you have a chance to document the relative density approach?


-o.


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 Post subject: Re: Dr. Hanneman's Tips: 2 :Specific Gravity Balance
PostPosted: Thu Oct 27, 2016 9:31 pm 
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Hello everyone,

News on the last invention from mister Hanneman?


Brigitte


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