We learn from Mr. Charles Joly, that there is to be a grand Horticultural Convention in Paris on the 4th to 9th of May next, in the Hall of the National Society of Horticulture, 84 Grevelle street.

The subjects to be discussed are much as in our conventions. Transportation Charges on Plants and Trees by Railroads; The Phylloxera; Horticulture in Agricultural Colleges; Influence of Age on the Quality of Seeds; Why do Grapes Shank? Cause of the Disease known as "White-root" in the Peach and some other fruit trees; Grape Mildew; The Advantages of Budding Fruit Trees; What are the best Market Fruits; What Fruit Trees or Shrubs desirable for Food are best suited to poor soils; Chemical Manures; Insecticides; Liquid Manure; Why Seeds of the same age and sowing do not always sprout in the same time; Why is there Difference in the time of Flowering of Trees raised from cuttings, and those raised by division of the roots; Hot-bed Materials; Diseases of Zonale Pelargoniums; Angle of the Rafters in Greenhouses; Advantages of different materials in the construction of Greenhouses; Steam and Water Heating; Barometers, Thermometers, Hygrometers, etc, in Horticulture; The Influence of various soils on the open air culture of Trees.

American Horticulturists in France at that time will receive a cordial welcome.