This blotter art to commemorate the 60th anniversary of Albert Hofmann's discovery of LSD. It is designed in the traditional style found on the street: a 7.5 x 7.5-inch sheet perforated into 900 quarter-inch "hits". Dr. Albert Hofmann kindly signed a limited edition of 60 of these pieces of blotter art. Each piece is numbered in the lower left corner and signed by Dr. Hofmann in the lower right. There are 3 prints currently available.