, the highest point in the mountains on the borders of Northern Persia (cf. Alburz ), somewhat below 36° N. Lat. and about 50 miles north-east of Tehran. According to de Morgan it rises out of the plateau of Rēhne to a height of 13,000 feet above it. The various estimates of its height differ: Thomson estimates it at 21,000 feet (certainly too high), de Morgan at 20,260 feet, Houtum Schindler at 19,646, Sven Hedin at 18,187, and in the last edition of Stieler’s Handatlas (1910) it is given as 18,830 feet. Its summit, perpetually snow-clad and almost always…