M. Frederich Seitz, of Easton, Pa., in a letter to a friend of his, which has been sent to our table, says, "I see that the Horticulturist passes over the advice of Mr. Rivers, in the Orchard House essay, where Mr. R. recommends preventing or curing mildew by fumigating with lime and sulphur, without a word of caution, after my sad experience last year, when I came near destroying all my vines in two houses by the same process; if I did use two instead of one handful of sulphur, it still proves the great danger of the process, and I think should not be passed over without a word of caution." This may be very true, and we put it now on record, though with these remarks. No other instance of such destruction has come to our knowledge, and all should confide entirely in the statements of Mr. Rivers and other practical men. Mr. Seitz informed us at the time, of his calamity; but as he stated that he put his lime and sulphur into old white-lead kegs, we had no doubt of the cause of the injury he experienced. Any chemist will inform him of the nature of the gases which would be evolved by the mixture of unslaked lime, sulphur and white lead.

Let Mr. S. convince himself of the efficacy of the two ingredients alone as recommended now on all hands, and use them as directed, and we think he will forgive the Horticilturist.

Fawke's Steam Plough is esteemed an eminent success. We must refer C. T. to the . Agricultural, the daily and weekly press, for full descriptions, and to exhibitions of this capital American invention where trials will be made.

C. P. Hale, Kentucky. Your first flower is Hedysarum prolificum, and the yellow one is Rudbeckia nirta. There is no "Grape Shrub" such as you describe. Send a leaf and a flower, or the fruit.