At the great exposition to be held in Cincinnati this Autumn, Horticulture has not been forgotten. The premiums are extremely liberal, many being one hundred dollars, and some three hundred dollars. We note however, that the miserable system of comparative competition instead of intrinsic merits is still the rule for judges, under which system nine-tenths of the premium money is usually as good as thrown away. It seems to us in a horse race the one which made "the best time on record," would be more meritorious than the one which "came in before Smith's ; old gray mare." As the managers of fairs seem to know more about horse trots than any thing else, we have thought this "horsey" illustration might perhaps carry our idea to their understandings better than anything else.