INSECTS. 80 



shell, by heavy dressings of lime ; this answered, however, 

 only temporarily, and Ave found it too expensive to con- 

 tinue it. The increasing demands for manures in the 

 vicinity of Xew York, has rendered them of late years 

 scarce and high in price, so that we were necessitated to 

 begin the use of guano and other concentrated manures, 

 and as this was rather new with us in our market gardens, 

 Ave have had the pleasure of some very interesting exj)eri- 

 ments. Last season, in my grounds at Jersey City, where 

 we have never been able to get two crops of Cabbages 

 successively, without having them injured by club-root, my 

 foreman suggested to me to experiment with a bed, of about 

 half an acre, to be planted with early Wakefield Cabbage. 

 One-half of this he proposed to manure at the rate of 

 75 tons per acre with stable manure, the other half with 

 flour of bone, at the rate of 2000 pounds per acre ; this 

 was accordingly done in the usual way, by sowing the 

 bone-dust on the ground after plowing, and then thoroughly 

 harrowing in. During the month of May we could see no 

 perceptible difference in the bed; but just as soon as our 

 first hot days in June came, down wilted the portion that- 

 had been dressed with stable manure, showing a well-de- 

 fined line the whole length of the bed, and, on pulling the 

 plants up, we found that our enemy was at work, while in 

 that portion that had been dressed by the bone-dust, not 

 a wilted plant could be seen, but, on the contrary, the 

 crop had most unusual vigor. This experiment has been 

 to me one of the most satisfactory I ever tried; it still 

 further proves, that this destructive insect cannot exist to 

 an injurious extent in a soil impregnated with lime, and also 

 proves, that we have a most effective remedy in this valu- 



