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" From " Techniques of the Great Masters of Art " : " Klee 's studies in the related fields of natural history , comparative anatomy and anthropology had brought Klee to the belief that nature was characterized by the permutation and movement of fundamental units of construction . The picture is so superbly organized into three " scoops " - a circle to right and to left , and a great oval in the center - that I cannot but believe he had his questions in mind from the start . He went to South America , and painted the Andes ; he traveled north , and gloried in the Niagara Falls ; and he moved on to the huge silences of the icebergs . " Still Life with a Beer Mug shows an extremely subtle handling of oils . In a small watercolor of the mid 1880s inscribed " Maurecourt " , on which she based this painting , Morisot appears to have depicted Edma , then about forty five years old , but this same figure appears rather younger in the painting . In fact , he had been attentive to the world around him all his life , in the way that he lived and in what he chose to paint . Thirdly , the fact that we could not choose our matched controls from the pool of negative screening cases – the resources that would have been necessary to ( repeatedly ) contact and arrange appointments with them exceeded our capacities – leads without any doubt to an overestimation of the specifity of our detection procedure . The public reacted as they did to all great works of art in the nineteenth century : they roared with laughter . I am often tempted to forget that these are questions , and to think that he is suggesting answers , but there are no answers here ; there are three fundamental questions , posed visually .