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Date: | Fri, 29 Oct 1999 16:42:37 -0400 |
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> In following the oiling shells conversation, I'm reminded that I have used
> glycerin on my Paryphanta lignaria lusca to keep the periostracum from
> drying up and popping off of the shell . I have heard stories of the shell frac-
> turing into many small pieces in an explosive manner. Glycerin was always
> recommended for protection.
>
> However, it renders the shell useless for scanning electron microscope work,
> so I've been told. How does it interfere ? Is this true with all shells ? Would
> mineral oil work just as well for the paryphanta ?
>
> Glycerin is hygroscopic, absorbing moisture from the air. It dissolves into alcohol
> or water, but will not dissove into oil. It also has a very high boiling point. Glycerin
> is used in clear soaps, in lotions as an emollient, in lubricants for molds and for
> scientific specimen preservation. Who else uses it on shells ?
>
> Is glycerin better or worse than oil for coating shells if they are not going to be
> used for research under the microscope?
>
> Thank you. Don't forget to turn your clocks back on Saturday.
>
> Mathilde Duffy
> [log in to unmask]
> Watertown, MA ( Boston suburb )
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