在夜晚,城市中的街頭上有些小攤點着一種燈——一個銅罐子用橡皮管連通着,在橡皮管的另一端點着白亮亮的火苗,這就叫做電石燈。電石燈所點的既下是油也不是電,而是一種氣體,在那銅罐子里面下半部放着一塊一塊像石頭樣的電石,上半部裝着水,水一滴滴的流下來遇到電石就發生了可以燃燒的氣體。這種氣體是什麼呢?這種石頭怎樣會發生氣的呢? 我們把這種石頭叫做電石,就因为它不是普通的石頭,天然並不存在,而是人工造出來的,並且的的確確是用電造出來的。電石的原料很簡單,只是生石灰(氧化鈣,CaO)和焦煤(碳,C)。把它們放在電爐中 At night, there are stalls on the street in the city where there is a kind of light - a copper pot is connected with a rubber tube, and a white, bright flame is at the other end of the rubber tube. This is called the Calcium lamp. The light of the calcium carbide lamp is not only oil but also electricity. It is a kind of gas. In the lower half of the copper pot, there is a piece of stone like a stone. The upper part is filled with water, and the water flows down. There was a flammable gas to the calcium carbide. What kind of gas is this? How does this kind of rock get mad? We call this kind of stone calcium carbide because it is not an ordinary stone. Nature does not exist, but it is artificially made, and indeed it is Made of electricity. The raw material for calcium carbide is very simple, just quicklime (calcium oxide, CaO) and coking coal (carbon, C). Put them in the electric furnace