(B. R. H., New York.) We shall be glad to hear the results of your experiments, although we fear that you will destroy their vitality in the process you propose trying. Various agents have been employed, with a view to assist and hasten germination by an increased supply of oxygen. Chlorine, in a diluted state, has been used with advantage. It may be obtained by mixing a tablespoonful of muriatic acid with a like proportion of black oxide of manganese, and a pint of water. The seeds are steeped for two or three hours, and then sown. A better way would be, to introduce a weak stream of chlorine gas into the soil, after the seeds are sown; this you may obtain by mixing the above ingredients in a retort, and applying a gentle heat.

Oxalic acid has also been used as a steep, and found to be very effective, removing the seeds as soon as vegetation commences.

Seeds moistened with water, and then rolled in newly slacked lime, are said to vegetate more readily, but experiments on this subject have not been much extended, and you have, therefore, an ample field for indulging, as you say, your "fancy for horticultural experiments. " It may be well to remember, that seeds will not germinate unless in contact with, atmospheric air. And we have the authority of Saussure, that light forms no impediment to this process, and that the development of the plant is more rapid than when the seeds vegetate in darkness. Light has been considered injurious, but this may proceed from the difficulty of keeping seeds uniformly moist when placed on the surface.