274 PRINCIPLES OF GARDENIXG. [CH. VIII. 



ignorantly been endeavoured to be produced in suc- 

 cessive crops. These had invariably failed, from the 

 occuiTcnce of the ambury ; but the brocoli was unin- 

 fected. The only cause for this escape that I could 

 trace was, that just previously to planting, a little of 

 the hydro-sulphuret of lime had been dug in. This 

 is a very fetid, powerful compound. \Vhere dry 

 lime purifiers are employed at gas works, it may be 

 obtained in the state of a diy powder ; but where 

 a liquid mixture of lime and water is employed, 

 the hydro-sulphuret can only be had as a thick 

 cream. Of the diy hydro-sulphuret, I recommend 

 eight bushels per acre to be spread regularly by 

 hand upon the surface, after the turnip seed is sown, 

 and before harrowing. If the liquid is employed, 

 I recommend thirty gallons of it to be mixed 

 with a sufficient quantity of earth or ashes, to 

 enable it to be spread over an acre in a similar 

 manner. 



For cabbages, twelve bushels or forty-seven gallons 

 per acre, would not, probably, be too much, spread 

 upon the surface, and turned in with the spade or 

 last ploughing. To effect the banishment of the 

 turnip flea, I should like a trial to be made of six or 

 eight bushels of the dry, or from twenty-two to 

 twenty-eight gallons of the liquid hydro-sulphuret 

 being spread over the surface, immediately after the 

 sowing, harrowing and rolling are finished. Although 



