We must move on; fatigue it will not do yet to listen to; we shall probably never have such another opportunity. As yet we have scarcely begun to see and hear.

Sir William evidently enjoyed with a high zest any discoveries which led to the detection of imposture. Such is the Revelenta of the shops, advertised all over London, which is nothing but a flour or meal prepared from the seed of lentils, or beans, to which the fabricators give a strangely corrupted name; and in order to carry the deception further, the advertisements exhibit a tropical scene of lusty negroes cutting down palm-trees amid Hindoo temples, for the preparation of lentil-meal from a humble vetch! They use the seed of Ervum lens, and the good English women have been giving it as the most wholesome dish to their children, till it was found out and exposed. - Here is Shola, the very soft pithy wood of AEschynomene aspera, of which those Sincapore hats are made. Used for a variety of purposes, where softness and lightness are required; floats for fishing-nets, etc. - Divi divi; the pods are most powerful astringents and rich in tannin; 3,000 tons are annually imported; the plant is Caesalpina coriaria. - The order Rosaceae, Rose family, of which roses are the type, including a large proportion of our esculent fruits; you see the various products either in reality or wax models of great beauty.

From the kernels of the West India cherry, Cerasus occiden-talis, Noyeau is prepared. - There is Henna, leaves, powder, and fruit of Lawsonia inermis, used in the East for dyeing the finger nails__Sir William smiles as he shows the piles of tobacco and bundles of cigars of all possible shapes and sizes, probably at the universal weakness of mankind; but he tells you that the English imports of all products of tobacco exceed 40,000,000 lbs. annually, and produce a revenue of twenty millions I of dollars. - Here is your American Poke-Weed, Phytolacca decandra, the root used in medicine, and the berries for staining wine, which is sent you of such good colors! from your own weed grown in Europe for this purpose. - Here is Cassava bread; Tapioca; Castor oil; Croton oil, etc. etc, all going to show how much we are indebted to vegetablesNettles, worthless as they are proverbially considered, yield a useful fibre, and some are neither unwholesome not unpleasant food. - Milk of the Cow-tree, used by the natives of Venezuela, and given to the children as we do cow's-milk. - Fruit and bark of the Upas tree, and concrete juice of the same; inhabiting the malarious regions of Java, this tree has a worse name than it deserves. - Jack; the gigantic fruit of Artocarpus integrifolia; the largest edible fruit that is brought to table; some have been known to weigh 80 lbs.; the odor is disagreeable, but the fruit good. - Those are shirts made out of the bark of two sorts of Tururi, one an Artocarpea, the other a Fig, from the Amazon - All the products of the Willow, plaiting, baskets, etc. etc. - Refuse Tan, from oak bark; made into cakes for fuel in Britanny. - Galls of various kinds from oaks; among them the large Mecca or Bussorah galls, called also Apples of Sodom, Dead Sea Apples; used in the East for dyeing, and more esteemed than the common nutgalls which are occasioned by the puncture of the Cynips gallse tinctoriae on the Quercus infectoria.

When on the trees, the Mecca galls formed by the Cynips insana on the same oak, are of a rich purple, and varnished over with a soft substance of the consistence of honey, shining with a most brilliant lustre in the sun, which makes them appear like a most delicious and tempting fruit. They are very astringent and scarcely bitter. The far-famed Mad-apples, Mala insana, or Apples of Sodom, Poma Sodomitia of Josephus and other writers; "the fruit which never comes to ripeness" of the Book of Wisdom, "Which grew Near to the bituminous lake where Sodom flamed," and which, though beautiful to the eye, yet crumbles at the touch to dust and bitter ashes; it was supposed by some to be the egg-plant of our gardens, by others to be a species of cotton tree, but by Lambert to be the galls here noticed. - You see there candles made from a tallow or oil from acorns in New Grenada (may they give light to Kinney and Walker). - Of the conifer© we cannot enter into an enumeration; the magnificent collection of Pine-cones occupying a large table-eabinet are of great value to nurserymen and planters, who compare them with cones they receive from abroad, and thus ascertain their proper names. The specimens of the cones of Auracarias and Dammars of the southern hemisphere are particularly valuable.

Nor can we enter upon the products of the order Palma-cesB, or Palm family; their several uses would require a volume to describe - "The Indian nut alone Is clothing, meat and trencher, drink and pan, Boat, cable, sail and needle, all in one".

They yield timber, fibre of every variety, oil, wax, starch, sugar, daily food, mild and intoxicating drink; it is rather difficult to say what they do not yield; the collection is wonderful, and if not complete, additions are constantly received.

The Screw Pine family, many of whose remarkable plants are natives of mnddy shores of tropical rivers, have aerial roots, which descend like buttresses, and prevent their being washed away by the currents. The leaves, as may be here seen, are manufactured into ropes, hats, etc. - Here is a basket made from Typha ele-phantina, which is probably the "bulrush" of Scripture, of which the basket was made for the infant Moses, and such are still in common use in Eastern countries. - This room contains the Cerealia and their products; let us pass it for fear of detention! only looking at some flour buried by Captain Beechy in 1824 for the use of Sir John Franklin, which when dug up in 1849, proved perfectly sound. - You see there the peats, condensed without pressure, and these having the character of coal, jet, etc, are capable of being turned into inkstands and door-handles, etc. - You are horticulturally inclined and therefore a trimmer; in that case is contained samples of wood cut through, showing the effects of injudicious pruning, and the various injuries and decays consequent thereon. A most important study, indeed.

Don't look at the wasps' nests and such matters, we must get to the plants; and the Director led us to another and even greater treat, our English lady still brisk and determined to see all. We soon discovered that she was alive to all that was said, and understood the rapid information so freely imparted; we must say she was "a good specimen," and above the average of English ladies for intelligence on these topics.

Before we proceed to the gardens and hothouses, it may be interesting to state the gradual increase of visitors since these gardens were daily thrown open to the use of the public. In 1841, the number admitted was 9,174; in 1845, 28,139; in 1850, 179,627, and in 1854, more than 400,000! The place is now the best of its kind in the world, and probably will so continue. The Crystal Palace at Sydenham may have drawn away some of its numerous visitors, but it must always remain, from its multiplicity of objects, the great school of Botany.

(to be continued).