Ryder 40, Wood 36 and some others ... Pubblico Deposited
- From johnmenc@optonline.net Mon Aug 06 13:42:05 2012
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From: "colonialjohn" <johnmenc@optonline.net>
Subject: Ryder 40, Wood 36 and some others ...
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Finally got to do some XRF assays (initial analysis) on some coins for the =
upcoming Forgotten Coins Book. Some comments:
1. Canadian Blackmsith Wood 36: Rarity 8? (Two Known?) The obverse head has=
the same general appearance as Wood 34 & Wood 35 with the infamous retrogr=
ade date reading 1471 which was doubtless intended for 1741. The William An=
ton Collection houses this variety as well as the Bank of Canada Money Muse=
um via W. Baker?. With this type of retrograde date it appears to be Britis=
h than Canadian but this has changed from my C4 Paper. Purchased actually f=
rom Cobwright in England for $600. An incredible coin and I have only trace=
d two of this AK-Plated coin. As with most Blackmsiths of Wood 34-46 of a "=
BASTARD" type composition with this example composed of (12) different meta=
ls and appears to be a low tin (4.55%) bronze (Cu/Sn) cast (Pb: 8.88 & 15.2=
%).
2. George II Counterfeit 1/2d's. Most contain high bismuth relecting Cornis=
h Copper. At the time (1730-1750'ish) the Cornish Copper mines were dominan=
t with the Swansea Copper mines coming around in the 1780/1790's. The analy=
sis confirmed this copper source for all types analyzed being Cornwall.
3. Ryder 40: Confirmed as struck with 18thC copper. Jeff Rock melting dilem=
ma? - hopefully we plan to do SEM/EDS comparions on these (5) coins: Ryder =
40, a 1770 Cobwright pouch example, Vermont Ryder 5 Cast, Ryder 25 and a V.=
13-88CT Machin Mills piece. See what happens. Microstructure (surface magni=
fication), inorganic metal and organic profiles.
4. GIII CC's - nothing special - same old 97-98% copper. Few impurities unl=
ike American 18thC State Coppers.
5. Ryder 5 - The lead value is of this coin was 1.42%. It does require more=
analysis. Cast bronze lead specimens have lead values which are very varia=
ble.
Hopefully some INTIAL signatures can be retrieved from this group when comp=
aring Machins to English imports and seeing if Ryder 40 is a melt down job.=
On this point I think Jeff's arguments will remain unchallenged as there a=
re no references or data groups to confirm or deny this point. We can only =
compare Ryder 40 to these (4) other pieces and discuss the findings - CAREF=
ULLY.
In all (25) coins were analyzed including a 1773 GIII Baby Face.
Byron - its not dead ... unfortunately we have not even scratched the surfa=
ce ...
JPL - 2012-08-06
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