Paper × 841 mm). A1 is half the size of a sheet of A0 (i.e., 594 mm × 841 mm), such that two sheets of A1 placed side by side are equal to one sheet of A0. A2 is half the size of a sheet of A1, and so forth. Common sizes used in the office and the home are A4 and A3 (A3 is the size of two A4 sheets). The density of paper ranges from for tissue paper to for some speciality paper. Printing paper is about . Paper may be classified into seven categories: Some paper types include:
How the Other Half Lives imposed by society, rather than the result of loose moral standards; that the slums were something that needed to be fixed rather than gaped at or shunned. The article proved to be popular, and Riis spent the better part of a year expanding it into the book published by Scribner's Books in 1890. It offered more illustrations and halftones than the magazine articles could offer. The book was successful. Soon after its publication, "The New York Times" lauded its content, calling it a "powerful book". The praise for "How the Other Half Lives" continued in many other newspapers all across