Has Any One Done A Specific Gravity Test On 1937 1938 Crown

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Author	Replies: 1 / Views: 1,867
shanew Pillar of the Community Australia 1041 Posts	Posted 02/15/2014 11:55 pm has any one done this test on our crowns I have been fooling around and cant get any were near or over 10 best was 9.7 I have done the test on 5 coins I got back a low of 8,7 8.9 9,3 9.7 9.7 each one tested 3 times there were 6 of those fake coins that gave me a specific gravity of over 9.1 each time might have to shoot up my crowns also they are fakes and I bought these from aust auction houses to am I doing it right Report this Post to the Staff

sel_69l Bedrock of the Community Australia 21786 Posts	Posted 02/16/2014 02:17 am Principle OK, but the technique could do with a bit of improvement. 1. Use a plastic container that is only just big enough to accommodate a fully submerged coin. 2. Use a scales that is most sensitively accurate in the weight range you are measuring. Remember the correct application of Archimedes' Principle: "When an object is wholly or partially immersed in a water, there is an apparent loss in weight, which is equal to the weight of water displaced". Edited by sel_69l 02/16/2014 02:21 am Report this Post to the Staff
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