Sentence:  More hot water is added, and the mashing process repeated, until the grain has been wholly deprived of its saccharine matter, which is generally accomplished by three, or at the most, four <WSD>mashings</WSD>... 
Meaning of the word marked with <WSD> tags:  The action of soaking malted barley etc., in order to convert starch into sugars as part of the brewing process.