It is necessary to prepare the woody specimens in a different manner. They must first be perfectly dried before the fire, or in the sun, and then a thin slice must be sawn (or cut with a powerful knife) out of the middle. This slice may be poisoned, as described hereafter, and mounted on the herbarium sheets at once. If the Polyporus is very thin, it may be mounted in company with the slice, but more than one specimen is desirable, as it is indispensable to have both surfaces handy for examination. If the specimens are very large, they are best kept in wooden boxes, and labelled according to the genera and sub-genera they contain; or they may be kept in drawers, the drawers being divided by partitions if large, and labelled outside. If boxes are used, they should all be the same depth; the height and width may be doubled or halved according to the nature of the plants: the plan will be better understood by reference to the diagram, Fig. 42. If this plan is adopted, there will be no waste space, and the boxes will stand evenly upon a sideboard or against a wall. [Illustration: Fig. 42. Cabinet for Fungi.] Before the specimens are transferred to the herbarium they may or not be poisoned, according to the wish or convenience of the collector. Some of my plants which have never been poisoned remain perfectly uninjured, whilst others, which have been treated with a strong solution of corrosive sublimate, have been devoured by larvæ, &c., introduced, I presume, since the plants were put away. A solution of corrosive sublimate in pyroligneous naphtha, carefully washed over the specimens, has been recommended; but the ordinary poison is oil of turpentine, mixed with finely-powdered sublimate, well shaken before applied. If the specimens are to be glued down, they should be mounted as shown in Figs. 38 and 39, so as to display all their characters, and fixed with poisoned gum tragacanth; but some botanists, and myself amongst the number, prefer to have the specimens _free_. For this purpose I have envelopes gummed to the herbarium sheets, and the specimens (including a small paper containing the spores) are free within the envelopes. Some mites are very fond of the spores of certain fungi, whilst they will not touch the spores of others: therefore, if the specimens are to be kept perfectly intact, gummed paper must be used, or they may be kept between little slips of mica. As to the labelling of the herbarium sheets, I shall not touch upon that, as the plan universally followed is similar to the one used for flowering plants, and described in this volume. Some sub-genera of Agaricus, however (as Tricholoma), are so numerous in species that it will be found requisite to have several wrappers for one sub-genus.