s， and its waters discharged a strong sulphuric acid odor， after having absorbed the oxygen of the air.
砖坯通常是要用模子压出来的，可是工程师只好用手来做。这件工作一共做了整整两天，工人们把陶土浸在水里，手脚并用，把陶土调和好。然后把它们分成一样大小的一块一块。一个熟练的工人不用机器，十二个钟头可以做一万块左右，可是林肯岛上的这五个制砖工人，两天所做的还不到三千块。他们把制成的砖坯一块挨一块地排在一起，等过三四天完全烧干，就可以用来砌炉子了。
generally bricks are formed in molds， but the engineer contented himself with making them by hand. all that day and the day following were employed in this work. the clay， soaked in water， was mixed by the feet and hands of the manipulators， and then divided into pieces of equal size. a practiced workman can make， without a machine， about ten thousand bricks in twelve
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