INSECTS. 321 



jured by club-root, my foreman suggested to me to ex- 

 periment with a bed of about half an acre, to be planted 

 with early Wakefield Cabbage. One-half of this he pro- 

 posed to manure at the rate of seventy-five tons per acre 

 with stable manure, the other half with flour of bone, at 

 the rate of 2,000 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 percept- 

 ible difference in the beds ; 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-defined 

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

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

 in that portion that had been dressed by the bone dust, 

 hardly 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 valuable and portable manure. The ex- 

 periment was, however, to me rather a costly one ; our 

 past experience told us that there was no reason to expect 

 that the portion on which the stable manure was used 

 would not be attacked by club-root, as it had borne a 

 crop of Cabbage the previous year, and nearly twenty 

 years' working of that soil had shown that this crop 

 could never be grown two years successively ; but experi- 

 ments to be satisfactory must be done on a scale of some 

 magnitude, and although I lost some $200 by the differ- 

 ence in the crop, I believe it to have been a profitable 

 investment. 



I have incidentally stated that the Cabbage crop, 

 treated in the usual manner, can only be grown every 

 alternate vear. the reason of which we infer to be that 



