Illustrations from Opus mago-cabalisticum et theologicum – Georg von Welling [1719] Selected Tweets from my Twitter stream @MrPrudence Group of Sun Spots and Veiled Spots – E. L. Trouvelot [1873]. Chromatic Drawings – Ivan Wyschnegradsky. Polyomino II – Jose Sanchez and students. Combinatorial patterns generated in Unity3D. Illustrations from Opus mago-cabalisticum et theologicum – Georg […]