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Metadata
- Work ID
- 93657
- Document ID
- 260952
- Title
- 虹吸
- Corpus root
- 維基大典
- Page title
- 虹吸
- File
- 虹吸.txt
- Path
- 維基大典/clean/虹吸/虹吸.txt
Punctuation options
虹吸
虹吸,
液流之相也。
有二皿,甲居高,乙居低,今取細管,充液
使盈, 浸其一口沒之于甲,封另口以出皿外,則以大氣所抵,管內之液不出於甲,俟置其乎乙內,管拱然若虹,方釋之,則無須泵
引,液自甲沿管而上,越其拱位,自流於乙。
原其理,
大氣壓力、
萬有引力使然也。其甲皿外管內之液柱下於甲皿液面者,大氣所承弱乎自重,遂墮而下,液稍出,其原所處遂成真空,甲皿之液為大氣壓力所驅,上而盈其空位,如是反復,涓然成流。非甲皿內管口與液面相離或二皿之液位相平而不止也。
以其無泵而吸液,所用甚廣,今之御
車而油乏者,以管取諸鄰車,即原此理也。古之九龍杯,亦此也。