detailed study of the crystalline complex of the main range in particular was commenced. We This work was continued during last b Expedition, and an extensive was made of the various types representative of It is a tragedy that on the journey the entire was stolen from one of our camps by Tibetan natives, the theft being presumably.in mistake for the era material collected in 1924, as well as by Wager in 1933, a comprehensive study is now being made of this particular region, although there must necessarily be gaps caused by the above irreparable loss. From the information available, it is hoped that it will soon be possible to give a fair, though incomplete, account of the stratigraphy and age, gs well as the ruling structure, of Mis com-na and inaccessible portion of y, the age of the Everest is not younger than Permo-Carboniferous, while the intrusive granitic rocks are probably Tertiary, and date from the movements of that age, both horizontal and vertical which have given rise to such pronounced structures as the Everest Thrust Fault (discovered last year on the south side of Everest), and the great fault-scarps confronting Tibet in many places along the northern flank of the main chain. There is, however, much important work -yet to be done on these problems.
Text read from the printed page and cleaned; old type leaves the occasional error.