The estimation of sulphide in alkali cya
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Ewan, Thomas
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Article
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1909
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Wiley (John Wiley & Sons)
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Portlnnd coment nppenr3 to need a lot of cnrbon diosido to mnko it snfe. Reti cnn take n littlr, lint cnn qitito well do without it. Over five tliousnnd tons of red cenielit hnvc nlrrdy bcon used in vnrioiis works in I J O t h sen nnd fresh water, irnd tlie resitlts l i n w been rcry sntisfirctory W