Sentence:  In all the operations of "chunam" work, <WSD>"jaggery</WSD>" water, i.e. a solution of molasses or coarse sugar, is invariably added by the builders, and its use appears to have prevailed from the remotest ages. There are various opinions among the modern practitioners regarding its usefulness, but those who have had the most extensive practice in building, hold it as an indispensable ingredient in the formation of a durable and hard cement; and it is stated that the operator evidently perceives the dissolvent property of the <WSD>"jaggery</WSD>" water, on its being tempered with the prepared mortar. 
Meaning of the word marked with <WSD> tags:  A traditional unrefined sugar used throughout South and South-East Asia.