Figs. A, B, and C represent, in section, the framework of the volume, _a_ showing the ends, _b_ the front, and _c_ the back. The material can be prepared in long strips of some soft wood by a cabinet-maker (if the collector has the necessary skill and leisure for framing it) at a cost of 60 cents a frame, if a number sufficient for a dozen boxes be ordered. Or, if it be preferred to order them made, the cost should not exceed 80 cents each. Before being placed in the hands of the binder the mitering should be carefully examined and any defect in fitting remedied, so that the glass, when placed in position, may have accurate bearings on all the sides. The interior of the frame is covered with tin foil, made as smooth as possible before application, to be applied with thoroughly boiled flour paste (in which a small proportion of arsenic may be mixed) and rubbed smoothly down till the removal of the blisters, which are apt to appear. The tin foil can be purchased, by weight, at druggists', and the sheets marked off and cut by a rule in strips of proper width, allowing for a trifle of overlapping on the sides. Its cost per volume is merely nominal. First-quality single-thick glass for sides must be selected, wholly free from rust, veins, air-bubbles, or any blemish. Such glass can be purchased at 15 cents a pane. The lower glass, after thorough cleaning, especially of its inner surface, with an alkaline wash, and a final polishing with slightly wetted white printing paper, is to be firmly secured in its place by a proper number of tin points; the upper glass is but temporarily fastened. The binder must be directed to cover the exposed sides of the frame with "combed" paper, bringing it over the border of the permanent lower glass and beneath the removable upper glass. [Illustration: FIG. 119.--Construction of the Lintner box.] The covers of the volume are of heavy binders' board (No. 18), neatly lined within with glazed white paper. On one of the insides of the lids may be attached, by its corners, a sheet with the numbers and names of the species contained in the volume, or these may be placed on the pin bearing the insect. If bound in best quality of imitation morocco, with cloth covers, lettered and gilded on the back, the cost (for a dozen volumes) need not exceed $1 each. If in turkey morocco, it will be $1.50. The lettering and ornamentation of the back will vary with the taste of the individual. The family designations may be permanently lettered, or they may be pasted on the back, on a slip of paper or gum label, as are the generic names, thus permitting the change of the contents of a volume at any time if desired.