“Every library in America must continue to grow.”—Eastman.
“One cannot observe the rapid growth of libraries during the last half century without being led to ask in wonder what is to be the result in the future. There is a law affecting the growth of libraries not unlike that of geometric progression. By the principle of noblesse oblige, a library which has attained a certain size is called upon to grow much faster than when it was small. It is difficult to foretell. For years to come libraries will grow rapidly. Ingenuity will bring into use new methods and new apparatus.”—Fletcher.[163]
“Libraries designed to serve the needs of decades to come prove too small before they are fairly occupied.”—Dana.[164]
“The model building of today will be quite out of date tomorrow.”—Marvin.[165]
Perhaps rate of growth cannot be calculated, but it can be shrewdly guessed. It is hard to be too sanguine. Growth in American libraries has oftener been underestimated than the reverse. In an established library you can multiply recent annual growth by twenty-five, for the probable life of the building, and subtract possible withdrawals. But moving into a new building, and growth of the population served, will tend to make needs for space increase in geometrical ratio rather than merely arithmetical, and there are always gifts to be anticipated. So let the sanguine members of your board reckon growth.
Exterior. Provision can be made by buying a lot larger than you will need at first. A plan can be drawn with future wings suggested, or more stories, or an ell. This will require stronger walls, and study of features which could be matched in making changes.
In large libraries, use of sub-cellars, especially for stacks, can be looked to, and sunken stacks, or at least subterranean caves for fuel, can be arranged under that part of the lot outside the building, or even in some cases under the street or an adjoining park. If the experiments now making in various places are successful, this growth downward may be almost as available as growth upward. But see “[Stacks Underground],” and “[Stack Towers],” in later chapters.
Interior. There are several ways for providing for changes inside. If you have enough money, build largely, and space out. Provide more space for books and readers than you can use at once. Make your floor-cases movable, and set them wide apart, to be closed up later as required. Set tables and chairs generously apart, and crowd them together when otherwise you would have to turn away readers. Provide attic and cellar so built and prepared for subsequent finish that they can be used to some purpose when more rooms are wanted.
That reminds me to say that a wise provision is to have as few rigid partitions anywhere, as possible. If you must have any, make them so light, even if sound-proof, that they can all be swept away when it becomes desirable to change.