 They recorded the physiological effects of high altitude, studied glaciers and ice pinnacles, and took meteorological measurements, including altitude data recorded with both aneroid barometers and boiling point thermometers.The Workmans' exploration of the Rose Glacier and the 45-mile-long (72 km) Siachen Glacier in Baltistan around Masherbrum in 1911 and 1912 was the most important achievement of their careers because it was the widest and longest subpolar glacier in the world and at the time, the least explored and accessible glacier as well.For two months, the Workmans explored the 45-mile glacier, climbed several mountains, and mapped the area.