A military dictionary - William Duane

Gold Coins.

		Weight ——		Fineness ——			Pure contents ——		Value ——
		Grs.100		Car.	grs.		Grs.100		s.	d.100
Bavaria,	the carl	150	,32	18	2	⁵⁄₆	117	,18	20	8	,87
Bavaria,	the max	100	,21	18	2	²⁄₃	77	,94	13	9	,54
Bengal,	the gold mohur	176	,50	23	3		174	,66	30	10	,95
Brunswick,	the carl	102	,36	21	3		92	,76	16	5	,02
Denmark,	the ducat of 12 marcs	48	,21	21	0	²⁄₃	42	,52	7	6	,30
England,	the guinea	129	,44	22			118	,65	21
	the half guinea	64	,72	22			59	,33	10	6	,
	the 7s piece	43	,13	22			39	,55	7
Flanders,	the double souverain	171	,50	22			157	,20	27	9	,79
Flanders,	the souverain	85	,75	22			78	,60	13	10	,89
France,	the louis of 1726	122	,90	21	2	²⁄₃	110	,95	19	7	,65
	the louis of 1785	117	,83	21	2	²⁄₃	106	,37	18	9	,93
	the 40 franc piece	199	,25	21	2	²⁄₅	179	,32	31	8	,85
	the 20 franc piece	99	,62	21	2	²⁄₅	89	,66	15	10	,42
Geneva,	the pistole of 1752	87	,13	22			79	,87	14	1	,63
Genoa,	the zecchino	53	,80	23	3	¹⁄₂	53	,52	9	5	,67
Germany,	the ducat	53	,85	23	2	²⁄₃	53	,10	9	4	,78
Hamburgh,	the ducat	53	,85	23	2		52	,73	9	4	,
Hanover,	the georges	103	,03	21	3		93	,37	16	6	,31
Hanover,	the gold gulden	50	,06	19	0	¹⁄₃	39	,80	7	0	,54
Holland,	the ryder	153	,54	22			14	,74	24	10	,92
Holland,	the ducat	53	,85	23	2		52	,73	9	4	,
Hungary,	the ducat of Kremnitz	53	,85	23	3		53	,29	9	5	,18
Madras,	the star pagoda	52	,75	19	2		42	,86	7	7	,05
Naples,	the onza	68	,10	21			59	,59	10	6	,56
Piedmont,	the zecchino	54	,	23	3	¹⁄₂	53	,72	9	6	,09
	the pistole of 1741	110	,10	21	3		99	,78	17	7	,92
	the doppia of 1755	148	,50	21	3		134	,58	23	9	,83
Portugal,	the joanese	221	,87	22			203	,39	36
Portugal,	the moidore	166	,	21	3	³⁄₄	151	,30	26	9	,35
Prussia,	the frederick	103	,03	21	3		93	,37	16	6	,31
Rome,	the zecchino	53	,55	23	2		52	,43	9	3	,36
Russia,	the imperial of 1755	255	,53	22			234	,23	41	5	,49
	the imperial of 1763	202	,18	22			185	,33	32	9	,62
	the imperial of 1801	202	,18	23	2	¹⁄₂	199	,90	35	2	,70
Saxony,	the august	102	,	21	2	²⁄₃	92	,08	16	3	,57
Siam,	the tical	281	,88	19	0	¹⁄₃	224	,13	39	8	,04
Sicily,	the onza	67	,94	21	3		61	,57	10	10	,77
Spain,	the doubloon before 1772	416	,65	21	3	³⁄₄	380	,85	67	4	,87
	the doubloon of 1772	416	,65	21	2	²⁄₃	376	,14	66	6	,88
	the doubloon of 1785	416	,65	21	2		373	,25	66	0	,74
Sweden,	the adolphus	102	,95	15	1	¹⁄₂	65	,77	11	7	,70
Tuscany,	the ruopono	161	,33	23	3	²⁄₃	160	,77	28	5	,45
United States	the eagle	268	,66	22			246	,27	43	7	,05
Venice,	the zecchino	54	,	23	3	¹⁄₂	53	,72	9	6	,09
Wirtemberg,	the carl	150	,32	18	2	⁵⁄₆	117	,18	20	8	,87

In the first column of this table is shewn the weight of each foreign coin in grains troy-weight; in the second column, the degree of the fineness in carats and grains of a carat; in the third column, the contents of fine gold in grains troy-weight; and in the fourth, the intrinsic value expressed in shillings and pence sterling.

The following example will be of guidance to ascertain the value of foreign coin in other money also foreign.

Example.

It is required to express the value of a louis d’or of France coined since 1785 in the money of Portugal.

As it is seen by the prefixed table that the louis of 24 livres tournois contains 106,37 grains of fine gold, and that the joanese of 6400 reis contains 203,39 grains of fine gold, I state the following equation:

				1		louis = x
1		louis	=	106	,37	grains
203	,39	grains	=	1		joanese
1		joanese	=	6400		reis
Result 3347 reis.

Table, which shews the Weight, Fineness and pure Contents of the principal Silver Coins of foreign Nations, as well as their intrinsic Value, expressed in English Money.

Silver Coins.