Hand Tools Archive

Subject:
Re: How to measure density of ARK stones

Bill Tindall, E.Tn.
If I remember my statistics correctly the error in measuring volume of a stone will be cube root of three (1.7) times the error in a single measurement. To distinguish 2.6 from 2.5 requires detection of a 4% difference. The single measurement error must be less than 2%. This accuracy is easily achieved with calipers. But. my stone has rounded edges, How to account for that loss of weight?

If I can find a graduated cylinder the stone will fit in it will be able to measure volume with an accuracy better than 4%. I have no means of measuring submerged weight, but that would be the way to go.

© 1998 - 2017 by Ellis Walentine. All rights reserved.
No parts of this web site may be reproduced in any form or by
any means without the written permission of the publisher.

WOODCENTRAL, P.O. BOX 493, SPRINGTOWN, PA 18081