INVENTION OF THE SAND CLOCK

被引：4

作者：

BALMER, RT

机构：

来源：

ENDEAVOUR | 1979年 / 3卷 / 03期

关键词：

D O I：

10.1016/0160-9327(79)90100-5

中图分类号：

N09 [自然科学史]; B [哲学、宗教];

学科分类号：

01 ; 0101 ; 010108 ; 060207 ; 060305 ; 0712 ;

摘要：

The simple draining liquid clepsydra (water clock) was in use in Egypt by 1500 B.C. The replacement of the liquid with a fine granulated material, thus converting the clepsydra into a clepsammia (sand clock), appears not to have occurred before the mediaeval period. What human need was then met by the sand clock that could not be met by a water clock or early mechanical clock? © 1979.

引用

页码：118 / 122

页数：5

共 12 条

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[2]

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[10]

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