LAMBERT'S PURE CULTURE 



Mushroom 



Spawn 



(t^r-i'! 



Produced by the new grafting 

 process from selected and 

 prolific specimens, thoroughly 

 acclimatized, has never failed 

 to run. 



This spawn is made from 

 cultures taken by the selective 

 method, recently discovered, 

 from choice specimens of the 

 best varieties of mushrooms 

 known to be thoroughly accli- 

 matized, and selected with 

 special reference to their size, 

 flavor, vigor and prolificness. 

 The elements of uncertainty 

 surrounding th old chance 

 method of producing wild 

 spawn (English and French), 

 is therefore eliminated, and a 

 uniform crop of the best mar- 

 ketable variety is thus assured 



to the exclusion of all other and inferior fungi. 



The importance of this discovery will be realized from the mere 

 statement that, for the first time in the history of mushroom culture, 

 can spawn be offered of a specific variety of mushrooms. 



C3f the varieties already developed, we are offering pure culture 

 spawn of the Agaricus Campestris (white, cream or brown), A. Arvensis 

 (cream), and Ji. Villaticus (cream). 



FOR SALE BY ALL LEADING SEEDSMEN. 



Practical Instructions on "MUSHROOM CULTURE" 

 mailed free on application. 



American Spawn Company, 



ST. PAUL, MINN. 



When answering advertisement mention .Mycological Bulletin. 



