Arm-chairs are not often desirable.

They take up much room, are heavy to move, and are not easy to get in and out of at a table.

In many cases simple stools on a single iron standard, without a revolving top, fastened to the floor, are more desirable than chairs.

The loafer doesn't like them; very few serious students object to them.
A stack room for small libraries is not advisable.

Don't crowd your cases close together unless it is absolutely necessary.
An excellent form of wooden case is one seven feet high, with shelves three feet long and seven and a half inches wide, supported on iron pegs.