FIG. 32.—Wooden Wall Case with Lodged Base ([Section 146]).
It should be noted that this variety of shelf fitting does not give absolute adjustability, but only a movement of about an inch up or down, as may be required. Smaller adjustments are impossible by this or any other similar system.
148.
148. There are various other methods of fixed shelf adjustments for wooden bookcases, English, American and German, but none of them possess any particular advantage over Tonks’ variety.
Absolute adjustability in shelf fittings, as applied to wooden cases, has been obtained in the English method, to be seen at various libraries in England. There are also various American systems.
Both of these forms are similar in principle to the absolute adjustments described under [Section 149], but the English system was the first to be patented, and therefore ranks as the pioneer of this type of shelf fitting.
Fig. 33.—Wooden Shelf Adjustment ([Section 147]).