The botanical garden of St. Petersburg, like all the rest of the institutions, is of gigantic dimensions. It contains sixty-five acres: a parallelogram formed by three parallel lines of hot-houses and conservatories, united at the extremities by covered corridors, constitutes the grand feature of this establishment. The south line contains green-house plants in the centre, and hot-house plants at each end; the middle line has hot-house plants only, and the north line is filled with green-house plants. The connecting corridors are two hundred and forty-five feet. The north and south line contain respectively five different compartments of one hundred toises each, that is to say, they are together six thousand feet. The middle line has seven compartments, that is, three thousand more, making in the whole length nine thousand feet!--_Granville's Travels_. * * * * * THE HIRLAS HORN. [Illustration: THE HIRLAS HORN.] The engraving represents an elegant complimentary piece of plate, presented by the Committee for managing the Eisteddvod, held at Denbigh, September, 1828, to Dr. Jones, their Honorary Secretary, for his valuable services on that occasion. Mr. Ellis, of John-street, Oxford-street, Medalist to the Royal Cambrian institution, was requested to execute (for this purpose) after his own design, a drinking goblet of an ancient form. Mr. E. thought of the _Hirlas Horn_, and he has completed a beautiful and unique piece of workmanship. It is an elegantly carved horn, about eighteen inches long, brilliantly polished, and richly mounted, the cover highly ornamented with chased oak leaves, and the tip adorned with an acorn; the horn resting on luxuriant branches of an oaken tree, exquisitely finished in chased silver. Around the cover is engraved the following inscription:--"_Presented by the Cymmrodorion in Gwynedd, to_ RICHARD PHILLIPS JONES, M.D. _for his unwearied exertions in promoting the Royal Eisteddvod, held at Denbigh_, 1828." The horn (the inside of which is lined with silver,) will contain about three half pints; and we doubt not that it will be often passed around, filled with _Cwrw da_, in remembrance of the interesting event which it is intended to commemorate-- "And former times renew in converse sweet." The origin of the _Hirlas Horn_ is as follows:--