Contributions in geographical exploration . lly in the area betweenthe mouth of Katmai River and Kashvik Bay. Because of theposition of the mountain wall of Katmai \alley, the area ofdevastation does not intergrade with this district of slightinjury but is sharply separated from it. | Since this district lies out of the area covered by wind blownash, the ashfall here is almost devoid of dust and fine particles,being composed of fragments of pumice heavy enough to berelatively little affected by air currents. The total amount ofash (about one inch) was so slight as to do practically no damagein
Contributions in geographical exploration . lly in the area betweenthe mouth of Katmai River and Kashvik Bay. Because of theposition of the mountain wall of Katmai \alley, the area ofdevastation does not intergrade with this district of slightinjury but is sharply separated from it. | Since this district lies out of the area covered by wind blownash, the ashfall here is almost devoid of dust and fine particles,being composed of fragments of pumice heavy enough to berelatively little affected by air currents. The total amount ofash (about one inch) was so slight as to do practically no damagein itself. And, at first sight, we were incHncd to conclude thatthe vegetation in this area was in no way injured by the erup-tion, but closer examination indicates that the bare places on 1S4 The Ohio Journal of Science [Vol. XIX, No. 3, the tops of a number of high knolls are probably results of theblast. There are a few groves of dead trees which, being exposedtoward the volcano, Hkewise find their most reasonableexplanation in the Photograph by R. F. GriggsALDERS ALMOST DESTROYED BY HAVING THEIR BUDS KILLED. The cambium was everywhere alive and wherever a bud escaped it grew out withundiminished vigor. Russian Anchorage, July, 1913. Jan., 191!)J Effects of the Eruption on Vei^etation 185 ZONE OF IIKAVV ASIIIALL. We come now to the consideration of conditions in thefifth zone where the vegetation, in addition to being swept bythe blasts already discussed under the preceding deeply buried under ah ashfall so heavy as to iircventthe restoration of an herbaceous ground cover. Concern-ing the conditions of death in this area but little needs to beadded to what has already been said in the preceding section,for the working of the added agent of destruction is so simpleas to require no particular exposition.
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