territory. Just such an advance did take place, how ever, no t so very long ago. THE ADVANCE o�' M VIIl GLACIER. No one knows the date of the latest great advance of Muir Glacier. It came after these trees had grown to maturity. It carried the ice front at least 34 miles to the south, and perhaps much more; that is from one point north of the site of the exhumed forcst to the ice front mapped by Vancouver in 17D4. 'rhus we see that Glacier Bay has had, first, a great original advance of the icc

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... tongues, which filled it com pletely, in common with all the tiords of southeastern Alaska; second, a recession to a stage when the glaciers were smaller than at prpsent, this being perhaps one of many such recessions; third, an advance of more than 34 miles, most of which took place before 17fJ4, though forward movement was stilI in progress about ISH; and fourth, a great recession between the latter da te and 1D11-12. One' (loes not hesitate to predict future great advances and retreats, althou. �h the time of �uch oscillations cannot be foreseen. It is to be hoped that Muir Glacier will soon advance ngain, at least to the position of the iee cliff of the nineties in the last century, for then the glacier was far more beautiful to travelers than now, though the recent reo treat adds an element of great interest to the scienti�t. Clearly the international boundary shouill not be shiftpd with every such fluctuation of a �ladC!', 1I0r �houlll coastal boundaries in glaciated mountains be 10eated without knowledge of allli regal'll for such glacial oscilla tions. TilE. MOUNT· ST. ElLUl rlEmo:'!. 'I'wo huill lrell Illiles northwe st of Muir Glacier is Mount Rt. miaR, If<,OOO feet hi.�h, at who,e baRe' an' the iHalas l lintl «lacier amI Yakutat Hay.