Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    Re: Voyaging the traditional way, Clay, venturing a bit off-topic
    From: Marvin Sebourn
    Date: 2004 Oct 31, 22:42 EST
    In a message dated 10/31/2004 8:51:39 PM Central Standard Time, FrankReedCT@AOL.COM writes:
    Fred H wrote:
    "The tongue is much more sensitive to texture than the fingers, and could probably make an assessment of whether a bottom was sand, silt, clay, etc much more accurately than the eye and finger."

    That rings a bell... I've definitely heard that before. Makes good sense, too!
    Frank R
    [ ] Mystic, Connecticut
    [X] Chicago, Illinois
    Geologists sometimes taste-differentiate minerals (NaCl / Sylvite, etc) and probably more often rely on textural tests, although it isn't so much the tongue that is used, as it is placing a bit of material between the upper and lower front teeth, pressing them together and moving them back and forth--pure clay is smooth, and there is a different textural feel for silt and sand. 
     
    There is a clay (advertised) toothpaste (Umbrian Clay?). A few years ago I spoke to the author of a journal article, "Geophagy in a Mississippi County" and he spoke of (as I remember) human consumption of clay as much as two - four ounces a day there, mainly in infants and young women.
     
    Marvin
    N5CL
       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.
    Email:

    Email Settings

    NavList ID Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site