The inner garden contains a well-arranged collection of the principal natural orders of plants, a large stove-house, two green-houses, an orchid and a fern house. Opposite one of the green-houses there is a small pond, the water for which is brought in from the River Dodder; but, in addition to this water-supply, the garden has a supply under pressure from the City of Dublin Water Works. The Gardens are open during daylight to the officers and students of the College, and to others on orders to be obtained from any of the Fellows or the Professor of Botany. Lectures are delivered in the Gardens during Trinity Term to the Medical School Class, and to students working for the Natural Science Medal. THE HERBARIUM. Between 1830 and 1840 there was a small collection of plants kept in presses in No. 40 College, which chiefly consisted of a series of specimens gathered in Mexico and California by Dr. Coulter; but it was not until 1844, when the late Dr. W. H. Harvey was appointed Curator, while Dr. G. J. Allman was elected to the Professorship of Botany, that the foundation of the present Herbarium was really laid. Dr. Harvey, prior to 1841, had spent several years in an official position at the Cape of Good Hope, where he had succeeded in making large collections of the native plants, and he had from time to time published (chiefly in Hooker’s _Journal of Botany_) many descriptions of new and rare forms. Compelled by the state of his health to return to Europe in the spring of 1842, in the following year his health was sufficiently restored to make him wish for some active employment. The Professorship of Botany became vacant in 1843, and Harvey was a candidate. To qualify him for the post, Harvey was made a M.D. _Honoris Causa_; but it was contended that this was not sufficient, and that a properly qualified medical man alone could occupy the chair. As a result, Allman was elected to the Professorship, and the post of Curator of the Herbarium was specially endowed for Harvey, who presented his collection of dried plants to the College, and received some increased pay therefor, with a proviso that, should other provisions be made, and that as a result he were to lose the post, a certain sum that was agreed upon should be paid to Harvey by the College. He entered upon his duties in March, 1844, and for a little over twenty years the Herbarium was yearly increased by his zeal and labour. In September, 1844, we find a record of his adding 4,000 species at “one haul” to the collection, from Sir W. Hooker’s duplicates; a few weeks later were added 1,400 species from the interior of the Swan River Colony, collected by Drummond. Soon the couple of rooms in No. 40 became too small, and room after room was added until the whole of the first or floor flat was filled. With this increase of specimens came the necessary demands on the Bursar for money, not only to pay for new plants, but for the necessary paper on which to mount them.