The chief requirements of book-shelving are accessibility and adjustability. The best material for book-stacks is undoubtedly fumed oak. An oak book-stack _10_ feet _10_ inches in length, _1_ foot _4_ inches in breadth and _6_ feet _10_ inches in height containing shelves _3_ feet _6_ inches in length, _7_ inches in width and _1_ inch in depth is an ideal stack for an open-access Lending Library. This stack fitted with Tonks’ fittings, the metal studs being about ¾ inch apart, contains _7_ shelves to the tier. For Lending Library purposes we can estimate that nine books will take one foot of shelf space, and each of the shelves will carry thirty books, therefore _7_ shelves or one tier will accommodate _210_ books, _3_ tiers, or one bay will take _630_ books and the complete stack will hold _1,260_ volumes. If we take _1,250_ as an average for each stack we can work out any problem arising if we know the number of books. For Reference Libraries _8_ books to the foot is the usual run. The shelves are _9_ inches apart and the top shelf _6_ feet from the floor and the bottom shelf _1_ foot from the floor. Iron and steel book-stacks, standard size, for “closed” libraries or for books accessible only to the staff are generally _7_ feet _6_ inches by _3_ feet _2_ inches, by _15_ inches, which may be joined (generally in bays of three) together. Standard reference book-stacks are _7_ feet _6_ inches, by _3_ feet _2_ inches, by _18_ inches. Special cases must be provided for large books. For detailed particulars of shelving _see_ Brown’s “Manual of library economy,” _1907_ edition, Sections _139-150_, and _1919_ edition, Sections _143-158_; Champney’s “Public Libraries,” _pp. 30-39_; Brown _and others_--“Open-access Libraries.” READING TABLES. Reading-room Tables should be made of oak, and for adults they should be _2_ feet _6_ inches high, and the breadth, where both sides are used by readers should not be less than _3_ feet. Each reader should be allowed _2_ feet _6_ inches. Tables should never be longer than _7_ feet _6_ inches. Where there is sufficient space tables _5_ feet long and _3_ feet in breadth are the best. If a sloping top is required a _fillet_ should be placed at the bottom to prevent papers slipping off. No more than _4_ to _6_ readers should be accommodated at each table. NEWSPAPER READING SLOPES.