Many a mickle makes a muckle, says the proverb, and whoever looks into the operations of society on the great scale will find how true the saying is. A national debt, a national crop, the cattle feeding on the hills of a broad continent, the school-going children of a populous commonwealth, the number of its vagabonds and criminals at large or in jail, all need such an array of figures for their expression that the amounts really convey no impression to the mind. The number of books collected in public libraries does not reach such unwieldy proportions as these, but it is still very large. The information gathered by the Bureau of Education for the purpose of exhibiting the condition of American society at the end of the first century of our independence shows that the libraries which are classed as "public" number 3,682 in the United States, and contain 12,276,964 volumes and 1,500,000 pamphlets. Of our private libraries little is known. In 1870 the census-takers reported 107,673 collections of this class, containing in all 25,571,503 volumes, but these numbers are known to be much below the truth. The acute and practical superintendent of the ninth census declared that this part of his work had no value, and even said that "the statistics of private libraries are not, from any proper point of view, among the desirable inquiries of the census." What a commentary upon the progress of society is contained in this opinion of the most accomplished statistician ever engaged in studying our social movements! It is but a short time since the owning of books was a mark of superior station in the world. What has produced the change?