IMAGE: An illustration from Robert Fludd‘s masterwork Utriusque Cosmi, first published between 1617 and 1621, which features in the chapter on “Universal Arithmetic”. It comes with the title “A Description of the Numbers” and explores the resonance of certain numbers with their counterparts in the physical world of objects. If you are wondering why a donkey is used to signify zero, Fludd helpfully provides an explanation, the “zero signifies a donkey, because (as they say) the donkey is of no use”.

T-SHIRT: Made in the U.S.A, sweat-shop free, American Apparel unisex T-Shirt. Medium weight and extremely soft, made from 100% fine jersey combed cotton. Available in a wide range of different sizes – prices starting from around $30/€28/£19.

HOW DO I BUY?: Select your country below to buy through your local Zazzle store and so benefit from better postage costs, delivery times, and minimal taxes.* If your country is not listed, fear not, you can shop via any of the other sites (for E.U., the U.K. site is recommended, for everyone else the U.S.), but be aware of the small possibility of extra costs relating to customs duty. Once on the Zazzle site, if not signed up with them already, a very simple registration will be necessary before completing the final purchase.


* In the case of T-Shirts, for some mysterious reason, the prices given by Zazzle for their euro currency stores are a little more expensive than their U.K. equivalent in pounds sterling (by about 5 euro). For those in the Eurozone it is is therefore a little cheaper to buy through the U.K. store! Postage is the same.