Second Note on the Movement of Scree-Material

Publisher Website
Google Scholar
Abstract
The first results of the experiment described in this note, namely, those relating to the period from May 5 to September 22, 1887, have already been recorded in a paper read before the Geological Society on February 29, 1888. After a brief interval the experiment was continued under the same conditions as before, from October 4, 1887, to May 5, 1888, with the object of comparing the rates of descent in the winter and summer halves of the year, and also of determining the effects on creeping of rain and snow. Allowing a distance of ½ mm. for the interval of 12 days during which the experiment was suspended, the total descent during the year was 13⅙ mm. ( i. e. a little more than half an inch), the mean rate of descent being therefore ·00140 inch per day. Comparison of the Rates of Descent during the Winter and Summer Months .—Dividing the year of the experiment into winter, from October 4, 1887, to April 3, 1888, and summer, from May 5 to October 4, 1887, and April 3 to May 5, 1888, we have :— Had the creeping movement been proportional to the range of temperature, the average daily descent during the winter, compared with that during the summer, would have been rather less, namely ·00095 inch per day. Not only, however, is the heat of the sun more intense in summer than in winter, and consequently the effects produced by passing clouds

This publication has 0 references indexed in Scilit: