1793

Jeannetty was paid L.T. 10.542/Ozt sometime around 1793.  Assuming his platina was 70% Pt and without calculating refining cost, 

c. 1793: 1 Troy Ounce platina (Est. 70% ore) = L.T. 10.542
c. 1793: 1 Troy Oz. Pt (.999 Ore) ~ L.T. 15.06
1793: 1 Troy Oz. Pt (Paris Labor, 1789) = L.T. 30.47 (S$ 7.92)
1793: 1 Troy Oz. Platinum (Paris First Base Cost) = L.T. 45.53 (S$ 11.83)

Although this may have been intercepted Spanish cargo (or ~two strong-boxes) of platina, it is more likely ore requested from and paid to the Casa de Platina directly @ ~3 Reals per Onza, a wholesale import European price.

 The 1795 Paris price was known to be L.T. 81.4034 ; Janetty's higher price appears to be retail.

25/5/1793 : 226.375 Marcs = 1,781.345 Ozt (55.406 Kgs.) ∴ 

Where 1 Paris Marc cost L.T. 12 (S$ 3.12) apparently from the Spanish Crown, 
226.375 Marcs (120.4425 Libras) cost L.T. 2,716.50 (5,646.76 Reales), so 
1 Libra cost 46.88 Reales (S$ 5.86 ; L.T. 22.55), or at the Spanish Onza (0.9243 Ozt), 
1 Onza cost S$ 0.3663 (2.93 Reales) x 1,927 Onzas = S$ 705.84

1793: 2.93 Reales/Onza = 46.88 Reales/Libra = S$ 5.86 at Madrid delivered to Paris.

May 1793: 1 Troy Ounce platina (Spanish Crown) = L.T. 1.525 (S$ 0.40, R. 3.17)

1793: 1 Troy Oz. Pt (Spanish Whols., intrinsic ) = L.T. 2.1785 (S$ 0.57)
1793: 1 Troy Oz. Pt (Paris Labor, 1789) = L.T. 30.47 (S$ 7.92)
1793: 1 Troy Oz. Platinum (Paris Cost) = L.T. 32.65 (S$ 8.48)

 
Citation: Oeuvres, Vol. 6; Antoine Laurent Lavoisier, France. Ministère de l'éducation nationale (18  ) p.679















 

France, 1790 - 1793

Jeannetty was paid L.T. 10.542/Ozt sometime around 1793.  Assuming his platina was 70% Pt and without calculating the refining cost, 

1793: 1 Troy Ounce platina (ore) = L.T. 10.542
1793: 1 Troy Oz. Pt (.999 Ore) = L.T. 15.06

The French Government purchased 75.038 Kgs of platina for Fr. 8,895

1791-1793: 1 Troy Ounce platina (ore) = L.T. 3.687
 
Assuming a par value 'Franc'/Livre, the French government price paid for platina 1791-93 was rather low:

1791: 1 Troy Ounce platina (ore) = Fr 8.13 (USD$ 1.60)

1792: 1 Troy Ounce platina (ore) = Fr 9.14 (USD$ 1.50)

1793: 1 Troy Ounce platina (ore) = Fr 7.88 (USD$ 1.69) 

Citation: Oeuvres, Vol. 6; Antoine Laurent Lavoisier, France. Ministère de l'éducation nationale (18  ) p.679


















See French Weights:
1) 23/9/1791: "7 Marcs, 6 Onces, 6 Gros" =  61.74 Ozt or Fr 8.13/Ozt.
2) 5/1/1792: 28 Marcs = 220.383 Ozt, etc. or Fr 9.15/Ozt.
3) Date? : 13 Marcs = 102.3 Ozt, etc. or Fr 6.61/Ozt.
4) Date? : 31 Marcs = 244.062 Ozt, etc. or Fr 12.23/Ozt.
5) 25/5/1793 : 226.375 Marcs = 1781.345 Ozt, etc. or Fr 1.5247/Ozt. 


Paid at different rates, the average price paid to Janetty was Fr 10.55/Ozt.




"real or apprehensive; at the same time, everything bought by foreigners, or which can be bought by them, has risen greatly; for instance, the cloth of Abbeville, a French commodity, has risen from 30 livres to 42 livres the aulne"

In 1790, at "45 L.T./Ell" and 1 Livre = £ 0.0365 ∴ 1 English Yard of 'Peignon' cost 37.098 - 39.57 L.T. (=£ 1.354 - 1.44)  

In May 1794, when '24 Livres' cost Fr 50. - 55., an Ell of 'Peignon' cost 3 Louis (£ 2.85)
∴ 1 English Yard of 'Peignon' cost Fr 123.66 - 131.90 (=£ 2.35) ; Fr 56.14 = £ 1.




Had the May 1794 Paris Price of manufactured Platinum likewise risen 62.63% from 1790,