Originally published in 1987, this important synthesis represented the first effort by modern scholars to convey the variety of ways in which medieval scientists and natural philosophers used mathematics and mathematical modes of thought to describe natural phenomena. Eleven distinguished historians of science contributed original essays on the application of mathematics to natural philosophy, astronomy, cosmology, optics and medicine. The book is a fitting tribute to Professor Marshall Clagett of The Institute for Advanced Study, Princeton, for his significant contributions to the history of medieval science.

'When an accident occurs, something may emerge of lasting value, for the human spirit may rise to its greatest heights. This happened on Haramosh.' The Last Blue Mountain is the heart-rending true story of the 1957 expedition to Mount Haramosh in the Karakoram range in Pakistan. With the summit beyond reach, four young climbers are about to return to camp. Their brief pause to enjoy the view and take photographs is interrupted by an avalanche which sweeps Bernard Jillott and John Emery hundreds of feet down the mountain into a snow basin. Miraculously, they both survive the fall. Rae Culbert and Tony Streather risk their own lives to rescue their friends, only to become stranded alongside them. The group's efforts to return to safety are increasingly desperate, hampered by injury, exhaustion and the loss of vital climbing gear. Against the odds, Jillott and Emery manage to climb out of the snow basin and head for camp, hoping to reach food, water and assistance in time to save themselves and their companions from an icy grave. But another cruel twist of fate awaits them. An acclaimed mountaineering classic in the same genre as Joe Simpson's Touching the Void, Ralph Barker's The Last Blue Mountain is an epic tale of friendship and fortitude in the face of tragedy.