He has also used ECG tracings and heart sounds as generative principles for musical compositions. EEG tracings from volunteers during orgasm were first obtained by Mosovich and Tallaferro in 1954. Scans of Norman and Nina De Garis Davies' tracings of Theban Tomb 13 (external). The exhibition featured a selection of her photographs, sketches, and fresco tracings. In 1946 Laposky began working with photographic pendulum tracings and harmonograph machine patterns. He employed patterns of clustered items through tracings to compose new pictures with apparent variety. These tracings work to validate The Primitive Hut model. Scott's phonautograph was intended purely for the visual study and analysis of the tracings. The tracings are most commonly arranged in a grid of four columns and three rows. His tracings and their translations were not published until after his death. Basu Praharaj searched these girls but did not find their tracings. His symbol is a black dot with golden tracings. One such example is the bizarre "White Chappel Scarlet Tracings" (1987) by Iain Sinclair. Drif appears as a character in Iain Sinclair's novel "White Chappell, Scarlet Tracings". Tracings to assist corrections are provided at the same time.