UK, 1809: Platinum Stills

It appears that several Platinum stills were "first manufactured" in this year, but the earliest was 1805.  Close examination of the December 1809 price record suggested the construction of the Platinum boiler (net Cu and Au) weighed 431.25 ozt, cost £ 288.512 (17.89 s. per Ozt.)

Second Platinum Still, for Thomas Farmer, by Dr. Wollaston is clearly not 423 Ozt (unless the Copper-weight was 90 Ozt?)

In addition to 300.75 Ozt Platinum, Wollaston's Still for Farmer (#2) contained Gold and Copper as well : £ 300. net £ 13.875 = £ 286.25 or 

1809: 1 Troy Oz. Platinum (Mfg, Still)  = £ 0.8651 (S$ )

Labor was underestimated, however, and fair value was presumed somewhat higher (1810.).
 

1809: 1 Troy Oz. Platinum (Mfg, Still)  = £ 0.9119 (S$ )
  
Fully manufactured Platinum cost +49% more than retail sponge, +258% over Scrap Bid.  Refined Platinum was +140% the Scrap Bid. Wollaston's purported Platinum price for this still is low compared to a Johnson Still manufactured in the same year.

1809: 1 Troy Oz. Platinum (Scrap bought)  = £ 0.25 (S$ )
1809: 1 Troy Oz. Platinum (Refined, Sponge?)  = £ 0.60 (S$ )
1809: 1 Troy Oz. Platinum (Mkt)  = £ 0.80 (S$ )
1809: 1 Troy Oz. Pt Labor (refined,worked sheet)  = £ 0.0130 (S$ ) 
1809: 1 Troy Oz. Pt Labor (Mfg, still)  = £ 0.0817 (S$ ) 
1809: 1 Troy Oz. Platinum (Mfg, Wollaston Still)  = £ 0.8946 (S$ )

1809: 1 Troy Oz. Platinum (Mfg, Wollaston Still)  = £ 0.93 (S$ 5.174)

c. 1833: This reference is presumably to the 1830s, when Platinum stills cost ~£ 1.22 - 1.25
 

Wollaston's platinum still for Richard Farmer entailed various manufacturing fees of 2s. 7.25d per Ozt. in a ~300 Ozt. still.

1810: 1 Troy Oz. Platinum (Refined)  = £ 0.80 
1810: 1 Troy Oz. Platinum (Mfg)  = £ 0.9302

Sulfuric acid c.1795 was £ 0.033/Lb. avd.; in 1840, ~£ 0.004





c.1809:

1809: S$ 1.0 = £ 0.225 ; S$ 4.44 = £ 1.0

1809:

  

  
Period of Depreciation: