24 MUSHKOOM GROWING AND SPAWN MAKING. 



from pure cultures, since the presence of particular foreign organisms 

 in the substratum under natural conditions is perhaps quite as im- 

 portant a consideration as that of the specific nutrient value of the 

 substratum. The following results are, however, suggestive : 



1. Agaric-US campestris. 



Leaves — good groAvth throughout. 



f},o\\ — fair growth, with tendency to become threaded early. 



Manure — good growth tliroughout. 



Beans — good growth throughout. 



Sugar beet — fair grox^tli. spreading very slowly. 



Potato — slight growth, spreading very slowly. 



Corn meal — slight growth, spreading slowly, soon becoming brown. 



2. Agaricus fabaceus. 



I^ea^es — very good growth, rapidly filling tube. 

 Soil — good growth, but slower than the above. 

 Manure — good growth, but slower than the above. 

 Beans — very dense growth, soon filling whole tube. 



Sugar beet — good growth : somewhat less rapid and abundant than the 

 above. 



3. Agaricus villaticus. 



Practically the same as Agarirus campestris. 



4. Agaricus fabaceus var. 



Practiciilly the same as Agaricus fabaceus. 



5. Bovistella ohiensis. 



Leaves — good growth throughout. 

 Soil — growth throughout, but sparse and threadlike. 

 Manure — good growth throughout. 

 Beans — good growth ; appressed. 

 Sugar beet — very slight growth. 

 G. Calvatia cyathiforme. 



Leaves — very good growth throughout. 

 Soil — good growth ; quite as rapid as above. 

 Manure — practically no growth. 

 Beans — good growth, but spreads very slowly. 

 Sugar beet — slight growth. 



7. Calvatia craniiformis. 



Practically the same as above. 



8. Calvatia rubro-flava. 



Practically the same as in the other species of this genus, but spreads 

 somewhat more slowly on soil. ' 



9. Coprinus atramentarius. 



Leaves — very good growth throughout. 

 Soil — slight growth. 

 Manure — fair growth, but very slow. 

 Beans — very good growth. 

 10. Coprinus comatus. 



Leaves — very good growth throughout ; rai>id. 

 Soil — good growth. 



Manure — very good growth throughout ; rapid. 

 Beans — very good growth throughout; rapid. 

 Sugar beet — very slow growth. 



