potash alum

American  

[pot-ash al-uhm] / ˈpɒtˌæʃ ˈæl əm /

noun

Chemistry.

1. alum.

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potash alum British  

noun

1. the full name for alum

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Etymology

Origin of potash alum

First recorded in 1830–40

Example Sentences

For example, episomorphs of white potash alum and violet chrome alum, of white magnesium sulphate and green nickel sulphate, and of many other pairs of salts, have been obtained.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" by Various

It is quite a matter of indifference to the photographer whether he uses potash alum or ammonia alum.

From Scientific American Supplement, No. 401, September 8, 1883 by Various

This was the common potash alum and uncombined with any carbonated alkali, and it passed into the stomach unchanged.

From Scientific American, Vol. XXXIX.?No. 24. [New Series.], December 14, 1878 A Weekly Journal Of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures by Various

Common alum is strictly potash alum; other two varieties are soda alum and ammonia alum, both similar in properties.

From The New Gresham Encyclopedia. Vol. 1 Part 1 A to Amide by Various

Further, the hair-like alum of Dioscorides, repeated by Pliny below, was quite conceivably fibrous kalinite, native potash alum, which occurs commonly as an efflorescence.

From De Re Metallica, Translated from the First Latin Edition of 1556 by Agricola, Georgius