I HAVE made an attempt to put forth in some kind of orderly sequence a few of the chief guiding conceptions of chemistry; endeavouring, on the one hand,

TO avoid technical details, and, on the other hand, to illustrate these conceptions by describing many common facts. I have tried to keep the attention of the reader fixed on the great generalisations of chemistry; and I have done my best to shew that these generalisations find constant application in the occurrences of everyday life.

[AUTHOR]