188 MASSACHUSETTS HORTICULTURAL SOCIETY. 



and plenty of phosphates and potash he gets as good crops as when 

 he bought large quantities of sulphate of ammonia. Thorough 

 tillage will develop the inert nitrogen of the soil in warm weather. 



Mr. Gregory said that he did not bring nitrogen forward as a 

 panacea. He spoke of the value of crude kainite, containing 

 about thirty per cent of common salt and thirty per cent of chloride 

 of potash. Agricultural chemists in Germany had found more 

 ammonia in heaps oi' manure, when kainite was used, at the end of 

 the year than there was before. Like salt or plaster it has the 

 propert}- of bringing out the latent power in the land, and produc- 

 ing crops that would not be got from it by high manuring. It has 

 been found especially beneficial on low land, at the rate of about 

 five hundred pounds to the acre. But the speaker warned those 

 who might use it that it drives the soil. 



A paper by Joseph H. Woodford, on " Heating Greenhouses," 

 was announced for the next Saturday. 



BUSINESS MEETING. 



Saturday, March 21, 1885. 



An adjourned meeting of the Society was holden at 11 o'clock, 

 the President, John B. Moore, in the chair. 



No business being brought before the meeting it adjourned to 

 Saturday, March 28. 



MEETING FOR DISCUSSION. 

 Heating Greenhouses. 



By Joseph H. Woodford, Newton. 



Mr. President and Members of the Massachusetts Horticultural 

 Society : — 

 I have been asked by your Committee to sa}' a few words about 

 Heating Greenhouses, and they were particular in their request 

 that what I should say should have a tendency to stimulate the 

 discussion of this most important subject, so as to develop a gen- 

 eral plan best adapted for the purpose ; and, with this end in view, 

 I bes to submit the foUowins remarks . 



