John Tyndall (1820-93) was a prominent physicist, particularly noted for his studies of thermal radiation and the atmosphere. He was a prolific writer and lecturer, who was able to bring experimental physics to a wide audience. While researching his 1860 work, The Glaciers of the Alps, he became a proficient climber, and this work, first published in 1871, combines climbing expeditions in Switzerland with comments on glaciation and geology. It was extremely popular, with a second edition in the same year, and German and American editions in 1872. He was one of a group of noted Alpinists of the period, making the first ascent of the Weisshorn in Switzerland and finally conquering the Matterhorn in 1868, three years after its first ascent. This account of Victorian climbing expeditions makes fascinating reading, and shows the length an experimental scientist was prepared to go in search of knowledge.