To classify the Akan Gold Weights of Ghana and the Ivory Coast is a very difficult topic. The reason is that it's giving hundreds of different weights with a (very special) number symbolism as well as that several weights of the same name have different equivalent masses in different regions depending on the aim of use. In the latter case one has to distinguish between a) the trade with Europeans on the coast, b) the transsaharian trade with Northern Africa and c) the inner-African trade. In the past it had given several trials from mostly European authors to assign a system of Akan gold trading measures, but all these are more or lesser failed. Nevertheless, these authors have executed good preliminary work and delivered a valuable contribution for the understanding of the gold trade in West Africa in the pre-colonial centuries. Strictly spoken, the truth is probably somewhere between these systems. However, here shall be try to give a work paper for an interpretation of that gold weights which were collected (mostly in the 19th century) for museums in Europe and elsewhere.
To make matters worse is still that the equivalent values have changed with the time and that the privileged European trading companies (especially the Dutch W.I.C.) had used different value definitions for their trading goods in oversea areas (Africa, America) and Europe. Beside of this, African chiefs had let use often lighter/more heavy weight pieces for reasons of the personal profit.
The crown of the Kings of Denmark, new created during the regency of King Frederick III of Denmark (reigned 1648-1670):
It is said, the most gold used in the manufacturing process of this crown was traded on the West African Gold Coast.
The figurative, brass-like figures served as weights for weighing of gold dust. (gold dust = fine granulate of solid natural gold)
All known, in museums showed Akan gold weights consist of so-called "yellow cast", that's meaning a cast of copper with zinc and/or silver or lead in different compositions corresponding to the natural occurences in the environment of the casting producer. The silver additive to the copper serves for a higher constancy of a copper-silver-alloy (in the sense of a higher corrosion resistance) opposite to a pure copper piece and the addition of a higher zinc content serves to a relief of the melting and casting process. Additionally a certain silver content gives a better and brighter luster of the metal.
Almost all Akan gold weights were manufactured with the technique of the so-called "lost-wax casting" (also: "cire perdue"-procedure; German: "Prozedur der verlorenen Form") whose principle goes back to the Chalcolithic period (4500–3500 BC). At this procedure was manufacted firstly a wax model of the desired figure. Beside of bee-wax was also used tallow, resin, tar, or similar materials. A such figure was covered with a fine coating of wood charcoal powder which was emulsified in a liquid water/argil/clay mixture. On this layer came further covers of argil which was fixed and fortified by palm fibres or (in later time) cotton fibres. The dried piece was heatened at which the liquid wax outflowed through little open casting-channels and in which the liquid metal cast was poured. The content of cinter and other (mostly carbonaceous) pollutions of the "yellow cast" material give informations about the age and producing region of a such figure.
One's hypothesising that the Akan or their anchestors brought this technology from the Killi region of the old, pre-islamic realm "Gana".
Sometime the name is combined with the local area name of the use of a certain weight unit. For instance: "Bremanansuru" means "a Nansuru used in Breman" (in southern Asante) or "Takyimansua" means "a Sua used in Takyiman" (Techiman) (Bono-Manso region northwestern of Asante) (Takyiman (Techiman) was the new Ashanti capital for the 1722 conquered kingdom of Bono-Manso.).
Twi-language:
- Entity of the pieces of a gold weight set: "Abrammo" (collective name)
- Other trade weights: "Nkaribo" (plur.), "Karibo" (sing.)
- King weights: "Sannabo" (Royal state treasure or kassa = "Osanna")
- 0.33 g : Nkokoa mienu (b) [2]; Baa (= Ba (c)) [6b]; Ba nyo [2],[6a]; Ba mwa [2]; Bae [2]; De n’damma (b) [2]; Dei damma [2]; Ma nyo [2],[6a]; Maa nwio (= Ma nwio) [2]; Sempowa nsa [2]; Sempowa miensa [2]; Sempowa ebaasa [2]; Taku (i) [2]
The Akan gold weights were used as trading weights for the admeasurement of gold which served as basis of a possible currency as well as a trading good itself.
Cowry shells from the Indian ocean served as exchange basis in the "inner-African" trade at the latest since the 15th century. There are two main species:
Cypeanea moneta(also: Monetaria moneta L.) (= cowries from the areas around the Maldives, Seychelles, Molucca Islands and from Ceylon, Bengal, Siam, Cochin-China etc.)
Cypeanea annulus(also: Monetaria annulus L.) (= cowries from Zanzibar and areas near the African coast) (a little greater as the first)
Other name for cowries: "Boesis" (Nederlands), "Bougis" (African name, derived from Portuguese "buzios" (shells)) (see Wikimedia Commons Category:Cowry money)
None of these species are found in the Gulf of Guinea, but these shells serve as currency in the old Inner-African kingdoms of Mali, Benin, Congo, Bornu etc. until to the transsaharian trade in the "Western Soudan" (= the western part of the Sahara until to Morocco and to the Gambia mouth) and whose neighbouring areas. The early Portugueses in West Africa organized first transports, amongst others with the aim of "cowry transports" from the Indian Ocean to Benin, from 1515, after the King of Portugal gave a license to a Portuguese merchant to have 500 Quintals of cowries brought from East India each year for the São Tomé trade. Also served cowries as ballast in His Majesty's ships without charge for freight.
However, before the North West African coast at the Canary Island occurs also a cowry species, originally called as "Coris". The Spanish, since the "Treaty of Alcáçovas" of 1479 the possessors of the Canary Islands, had disposed per law, that the purchase and sale of such shells be a Royal monopol and a trade with these was forbidden on pain of penalties. Nevertheless prove Spanish documents from 1483 and 1487 that it has given a bright smuggling with "Coris" from the Canary Island, which were very treasured for the inner-African trade. With Cowries from the Seychelles, Maldives and Zanzibar was crerated by the Portugueses a further distribution bar for the bring of cowries in the African trade.
Cowries are not to confuse with "Akori beads", about which is reported in the literature since earliest times. Akori beads (historical spellings: Aggrey, cory, aigri, aggri, anchicos) (and one can in these see a certain "currency" too) come from the coral-like species Allopora subviolacea and were already known and valued in the ancient Egypt. The shoulder jewellery of the old-Egypt pharaos shall been manufactured from Akori beads.
- 1 gold dinar = 400,000 cowries (but sometimes until to 1,200,000) (Ibn Battuta for the Maldives)
There were great fluctuations in Guinea trade and Eureopean trade. Pretty each European author in the history reported about that and this concerns the value as well as the mass equivalents for the trade, equally where a such trade occured.
The name "Ackie" (English: "Angel", "Akye", "Acce", "Ackie"; Portuguese: "Ache", "Ake"; German/Dutch/Danish: "Engel", "Achtjen", "Esterlin"; French: "Aoque", "Ecu") comes from an old English gold coin depicting the Archangel Michael fighting the dragon. The coining of an "Angel" was ceased in 1634. In this year one Angel (Ackie) was worth to 6/8 d. in England and 1/12 of one troy ounce in the Netherlands.
The Akan name in the 17th century for an "Ackie" was "Mediataba", "Metabbe", "Medrataba", "Metaba", "Meterra" or in similar spellings. Originally an "Akye" is the name of the plant (tree) Blighia unijugata on the Gold Coast.
General exportation of gold from the Gold Coast of all European nations in the 17th century: ca. 7000 Mark/year = 56,000 Ounces/year. (Bosmann)
A special importance in the 19th century had the Austrian "Marietheresientaler" of 1780 (and only the coin of 1780, that's meaning the coining year must be "1780"; the diadem of Empress Maria Theresia must have 8 points and the crown on her head 7 points - all other coins were rejected). This coin serve as exchange money for the trade in entire Africa in the 19th century, especially blank and unused coins were liked in the Sahara room. But also in East-, Central- and West Africa and in Luanda it was accepted until to the Sambesi areas and also in Natal, Transvaal and other areas. Of course, only Austria had had the right to coin these Thalers, but any European governements have let coin at the Imperial Austrian mint in Vienna millions of "Marietheresientaler of 1780" (called "Abu Thir" (litarally: "Bird's father") or "Levantine thaler") for their wars and their trade in Africa. In the trans-Sahara trade the Maria Theresia thaler replaced the Spanish "Duro" coin (also called "Abu Medfu", from Cëuta and Morocco) or the French Five-Francs coin (from Algier and Tunis) to end of the 18th to begin of the 19th century. Alone the British-Indian Rupie-coins was also accepted in East Africa.
- 1 Maria Theresia thaler = 20.000 cowries (the greater variant) = 23,389 g fine silver or 0,751974 fine ounces (1850s, Lagos)
- 1 Agades-Mitkal = 1.000 cowries (the most little variant of a Mitkal)
- 13 Mitkal = 1 Ounce (19th cent.)
European counting measures (historical)
Factor
English
Danish
German/ Nederlands
French
1/8
Otting- Otter-
Achtel- Achtjen-
demi-quart huitième
1/4
quart- quarter
Fjierding- Kvarter- Potter
Viertel- Quarter- vierde-
quart
2
double
Dobbelt-
Doppel-
double
4
four-
fir- fire-
Vier-
quadruple
8
gros
12
dozen
Bismer-
Dutzend, Duizend
douzaine
13
baker's dozen
Tretten-
Großdutzend, Dertien-
grande douzaine
15
Mandel
quinzaine
16
Lis-
20
score
Snese-, Stieg
Stiege
vingtaine
48
Schock (1758)
50
cinquantaine
58
gros tournois
60
threescore
Skok
Schock
64
Großschock
80
fourscore
Ol-
Achtzig-
100
hundred
Hundrede
Hundert
cent
112
hundredweight
120
great hundred
Storhundrede
Großhundert
144
Gros
petite grosse (12 x 12)
1000
mille thousand
Tusinde
Mil-, Tausend
mille
1200
great mille
Stortusinde
Großtausend
1728
Maß, Großgros
grande grosse (12 x 12 x 12)
2000
head
Kopf
"Head" or "Kopf" come from Portuguese "cabeça". (= Cabes = string with a certain number of cowry shells)
General weight equivalents at the trading system on the Gold Coast:
[p.] = "Peso" (pl. "Pesos" originally "Pees") = name for a "piece of an eighth" (for all silver as well as copper coins), not to confuse with [p.] = "pieces d'Indie" (= slaves)
Portugese gold imports from West Africa to begin of the 16th century:
- 1 English "Pound de Trois" : 1 English "Pound de Havre" : 1 Dutch Pound : 1 Spanish Pound : 1 French Pound
= 7032 : 8586 : 9232 : 8664 : 9216 (1735, Zedler)
18th and 19th centuries:
- 1 Ounce Troy (gold and silver ounce) = 31,1 g
- 1 Ounce Avoirdupois (trading ounce) = 28,4 g
currency:
gold coins:
Monetary standard for gold coins: 1 Pound Troy (= 373,1657 g fine content) = 44½ parts, each à 20 Shillings with gold in a purity of 22/24 parts gold + 2/24 parts copper
("Sterling standard for gold" = 916 2/3 : 1000 from one pound troy)
- 1 "James piece" = 25 Shillings
- 1 "Broad piece" = 23½ Shillings
- 1 "Carolus" (pl. "carolines") = 22 Shillings (with portrait of Charles I. as English answer to the French "Louis d'Or")
Monetary standard for silver coins: 11 Pounds Troy + 2 Pence shall be amended by 18 Pence copper "Sterling standard for silver" = 1 Pound troy silver fine = 16 Ounces troy silver fine
- 1 Ounce = 20 Shillings, each à 12 Denarii (Pence)
[nfl.] = Nederlandse Florijn = originally: "Guldengroschen"
[£V] = Ponden Vlaams, Pont Vlaamsch
"Markgeld" = money on gold base (... no silver)
Generally:
- 1 nfl. = 20 Stüver ("stuyvers", "Stüber", "Netherlands shilling"), each à 12 Grot
- 1 £V = 20 Schilling Vlaams = 6 nfl. = 120 Stüver (fix rate in the 18th cent., Unger)
- 1 Stüver = 6 ... 20 Pfennige (fluctuations in the 18th cent.)
on the Gold Coast:
- 1 Ta = 1 Greater Banda = 2 Ounces + 8 Ackies = 80 nfl.
Beside of this, especially on the Gold Coast gaves it also so-called "Kakeraasgold" (literally "Kakeraas" = "thing of little value") which was polluted gold produced mostly by the natives. It was often used for the daily business (for instance for daily food purchasing). According to Bosmann (1690s) was the value of one ounce "Kakeraas-gold" not more as 20 nfl.
There were bitter hostilities on the part of the Portugueses and French opposite to the "Flamengos" (= Dutch). The Portuguese "Governador" paid (also to the natives) a prize of 100 "Gulden" in gold for each killed Dutchman (around of 1599) and also the (well etablished) French killed each Dutchman they met on and before the West African Guinea Coast. From this result many cruelties until to whole massacres to Dutch ship crews especially by the natives. Additionally came many pirate activities in the areas before and on the coast. Nevertheless, in the years 1592-1607 returned more as 200 Dutch ships with more as 10.000 seamen from West Africa (mostly from the Gold Coast) to the Netherlands and brought beside of great masses of gummi, hides, pepper, and "elephant dents" also more as 1000 kg gold dust/year. Dutch ships which sailed to the Guinea Coast for trading aims were freed from the export duty from 1593 onwards. Also undertook the Portugueses several "penalty expeditions" against the natives on the Gold Coast which had traded with the Dutch in this years. Nevertheless of an official armistice between the Netherlands and Spain/Portugal from 9th April 1609, the anti-Dutch hostilities on the Gold Coast continued and induced the Dutch "Staten-Generaal en Admiralities" to send a military expedition to the Gold Coast in 1611 and to establish a Fortresse at Mouri at the request of the King of Sabou as first fortified post to the protection of the there trade (the "Vestung Nassau", built in 1612).
The wars in Europe, especially with the English-Spanish war (1739–1742, also called: "War of Jenkins’ Ear") and the "War of the Austrian Succession" (1741-1748), as well as particularly the wars on the Gold Coast, especially in connection with the events in and around Elmina 1736-1740, the Dahomey invasion to the Gold Coast of 1737, the anti-Akwamu rebellion in Accra (1737/1738), the Ashanti invasion to Gyaman and Bono-Manso (around 1740), the invasion of Little-Popo to Anloga (1741), the annexion of Akwamu and Accra by Akim (1741/1742), the Denkira-Ashanti war of 1742 ..etc. until to the re-appearance of the French on the Gold Coast in 1743 results in a general decline of the gold standard in Europe in opposite of silver.
Beside of that had the Netherlands "Generalstaaten" with a "Reglement" from 6th of October, 1734, the Dutch Gold Coast trade opened for the next 20 years, that's meaning, all interested citizens of the Netherlands had the right for free trade on the Gold Coast. In 1754 this reglement was longened to 1761 and 1761 to 1791 (the end year of the "Octroi" for the Dutch W.I.C.). In this time also all Dutch Non-W.I.C.-ships could trade on the Guinea Coast under payment of a tax for the W.I.C..
(W.I.C. = "Niederländisch West-Indische Compagnie")
A result of all of these events was the decreasing and finally the total collapse of the European trade on the Gold Coast in the 1740s.
- 1 Mitkal = 1 Maria Theresa thaler (Abu Thir) = 1½ silver thaler = 3.000 cowries (Bornu, 1824, Clapperton)
Beside of this, the years 1738-1758 were the years of the badest hunger-catastrophe in West Africa since 2000 years which accompanied years of extreme drought in the savanna and rain forest regions southern of the Sahara. In the regions of the Niger boucle one calls from the years of the "Bari Bouri"-dearth, because in these years almost the half of the population of Timbuctu death by hunger. In other regions around the upper Niger was it still bader.
Schematic drawing of the number symbolism on a "1 Pereguan" weight from the Agni (Anyi) region (Ivory Cost) (after figure at Abel)
To the interpretation of this symbolism:
- Upper + lower bar code line = 2 x 10
- St. Andrew's cross (saltire) = 8
- Horizontal line in the centre = 4
- Upper line bar code = 10 over all = multiplication with 10
Total interpretation for this figure: 8 + 4 + 10 + 10 = 32 → 10 x 32 = 320
Weight, theoretical: 320 Taku x 0.2194 g/Taku = 70.208 g (according to Abel)
(1 Taku = 3 grains of Abrus precatorius, average weight of 1 seed-grain = 0.0731 g → 1 Taku = 0.2194 g)
Weight, real: 70.10 g
Conclusion: This weight represents 1 Pereguan = 320 Taku.
Control: 70.10 g / 0.2194 g/Taku = 319.5 Taku
Wilhelm Crecelius (Hrsg.): Josua Ulsheimers Reisen nach Guinea und Beschreibung des Landes. In: Alemannia. (Bonn), 7 (1879), S. 97–120 (regard to Guinea part of the traval narrative)
digitalised here(Ulsheimer was German ship's doctor on Dutch vessels; The source gives the original wording for travels to the Gold Coast in 1603-1604.)
Samuel Braun, "Samuel Brun / des Wundarztes and Burgers zu Basel / Schiffarten : Welche er in etliche newe Länder und Insulen / zu fünff underschiedlichen malen / mit Gottes hülff gethan : An jetzo aber / auff begeren vieler ehrlicher Leuthen / selbs beschrieben : und menniglichen / mit kurzweil und nutz zu läsen / in Truck kommen lassen.", Basel, 1624 (Braun was German-Swiss ship's doctor in service of the Dutch. Travel to the Gold Coast (and other) in 1614)
Wilhelm Johann Müller, "Die Africanische Landschafft Fetu", Hamburg 1673 (Müller was German preacher for the Danish on Fort Fredericksborg in the 1660s.)
Olfert Dapper, "Description de l'Afrique : contenant les noms, la situation & les confins de toutes ses parties, leurs rivieres, leurs villes & leurs habitation , leurs plantes & leurs animaux, les moeurs, les coûtumes, la langue, les richesses, la religion & le gouvernement de ses peuples : avec des cartes des États, des provinces & des villes, des figures en taille-douce, qui representent les habits les principales ceremonies des habitans, les plantes & les animaux les moins connus", Amsterdam 1686, Reprint New York 1970 (Dapper was a 17th century Dutch author which collected and summarized the reports of seamen about the Gold Coast as well as the then existing literatur for many years.)
Wilhelm Bosmann, "Reyse nach Guinea oder ausführliche Beschreibung dasiger Gold-Gruben / Elephanten-Zähn und Sclaven-Handels / nebst derer Einwohner Sitten / Religion / Regiment / Kriegen / Heyrathen und Begräbnissen / auch allen hieselbst befindlichen Thieren / so bishero in Europa unbekannt gewesen", Hamburg 1708 (Bosmann was "Assessor" of the Dutch W.I.C. on the Gold Coast in the 1690's.)
Otto Friedrich von der Gröben, "Orientalische Reise-Beschreibung, des brandenburgischen Pilgers Otto Friedrich von der Gröben: Nebst d. Brandenburgischen Schifffahrt nach Guinea und der Verrichtung zu Morea, unter ihrem Titel", Marienwerder 1694 (Reprint 1981) (Otto Friedrich von der Gröben was "Kammerjunker" (chamberlain) of the Great Elector of Brandenburg and first Commandant of the Fort Großfriedrichsburg on the Gold Coast.)
Ludewig Ferdinand Römer, "Nachrichten von der Küste Guinea", Kopenhagen 1769 (Römer was Danish serviceman on the Gold Coast in the 1760s.)
Joseph Dupuis, "Journal of a residence in Ashantee", London 1824 (Dupius was British consul at a meeting with the Asantehene in Kumasi, 1817/1818.)
Hans Christian Monrad, "Gemälde der Küste von Guinea und der Einwohner derselben, wie auch der Dänischen Colonien auf dieser Küste", Weimar 1824 (Monrad was (Danish) Christian Preacher on the Gold Coast 1805-1809.)
Schmeller, "Ueber Valenti Fernandez Alema und seine Sammlung von Nachrichten über die Entdeckungen und Besitzungen der Portugiesen in Afrika und Asien bis zum Jahre 1508", In: Abhandlungen der philosophisch-philologischen Classe der königlich bayerischen Akademie der Wissenschaften, München, vol.4, No.3, 1847
Johann Gottlieb Christaller, "Dictionary of the Asante and Fante Language called Tschi (Twi)", 2nd Ed., Basel 1933 (first published in 1875; Christaller was missionary and philologist of the "Basler Missionsgesellschaft" on the Gold Coast in 1853-1868.)
Gerhard Rohlfs, "Geld in Afrika", In: Dr.A.Petermanns Mitteilungen aus Justus Perthes Geographischer Anstalt (Gotha), vol.35, 1889, pp.187-192 (Rohlfs was German Africa traveller, Africa researcher, geograph and author.)
Louis Gustave Binger, "Du Niger au Golfe de Guinée par le pays de Kong et le Mossi", Paris 1891 (Binger was Africa traveller, Africa researcher, French colonial officer and Gouverneur.)
J.G.Doorman, "Die Niederländisch-West-Indische Compagnie an der Goldküste", In: Tijdschrift voor Indische Taal-, Land- en Volkenkunde (Batavia), vol.40, No.5/6, 1898, pp. 387-436
Rudolf Zeller, "Die Goldgewichte von Asante (Westafrika) - Eine ethnologische Studie", In: Baessler-Archiv - Beiträge zur Völkerkunde, Leipzig/Berlin, 1912
Hedwig M.A. Fitzler, "Portugiesische Handelsgesellschaften des 15. und beginnenden 16. Jahrhunderts", In: Vierteljahrschrift für Sozial- und Wirtschaftsgeschichte, vol.25, 1931, pp.209-250
H. Abel, "Déchiffrement des poids à peser l'Or en Côte d'Ivoire", In: Journal de la société des Africanistes (Paris), vol. 22, No. 1/2, 1952, pp.95-114 as well as vol. 24, No. 1, 1954, pp.7-23
Astrid Friis, Kristof Glamann, "A history of prices and wages in Denmark 1660-1800", Copenhagen 1958
Raymond Mauny, "Tableau géographique de l'Ouest Africain au moyen age d'après les sources écrites, la tradition et l'archéologie", thèses Univ.Paris 1959, Dakar/Lisboa 1960
W.S.Unger, "Bijdragen tot de geschiedenis van de Nederlandse Slavenhandel - II. De Slavenhandel der Middelburgsche Commercie Compagnie 1732-1808", In: Economisch-historisch Jaarboek, vol.28, 1961, pp.1-148
Marion Johnson, "The ounce in eighteenth-century West African trade", In: Journal of African History, vol.7(2), 1966, pp.197-214
Albert Ott, "Akan Gold Weights", In: Transactions of the Historical Society of Ghana, vol. 9, 1968, pp.17-42
A.Teixeira da Mota, "Der portugiesische Seehandel in Westafrika im 15. und 16. Jahrhundert und seine Bedeutung für die Entwicklung des überregionalen Handelsverkehrs", In: Kölner Vorträge zur Sozial- und Wirtschaftsgeschichte, Univ.Köln, Heft 5, 1969, pp.1-19
Marion Johnson, "The Cowrie currencies of West Africa - Part I", In: Journal of African History, vol.11(1), 1970, pp.17-49
John J. McCusker, "Les équivalents métriques des poids et mesures du commerce colonial aux XViie et XVIIIe siècles", In: Reviue française d'histoire d'Outre-Mer, vol.62, No.224, 1974, pp.349-365
John Vogt, "Portuguese Rule on the Gold Coast, 1469-1682", Athens 1979
Timothy F. Garrard, "Akan weights and the Gold Trade", London 1980
Erik Göbel, "Danish Trade to the West Indies and Guinea, 1671-1754", In: The Scandinavian Economic History Review, vol.31(1), 1983, pp.21-49
Hartmut Mollat, "Die Akan-Goldgewichte Westafrikas. Neue Aspekte zum Gewichtssystem und zur Funktion geometrischer und figürlicher Formen", In: Baessler-Archiv, N.F, vol.47, 1999, pp.259-275