This work is enlarged to 528 pages of our usual book size. Great pains and much labor have been bestowed on its preparation, and it is needless to say that its value cannot be estimated. Its numerous quotations and references, make it as reliable as it is interesting and useful; but these have considerably increased the labor of its execution. In its enlarged size, it is well worth $1.50, and probably would not be sold for less than that by any other publishing house in the country; but the trustees have decided to sell it for $1.25. In fixing the price thus low, the Association have had in view the benefit to result from a wide circulation of the book, rather than to receive a large profit on the work. Each buyer will really receive a donation from the Association of a part of the sale value. And great inducements are offered to the friends of the cause to circulate it among their friends and neighbors. Send in your orders, and they will be filled immediately. Price, post-paid, $1.25.