Mycological Bulletin 



Nos. 67-68 



IV. A. Kellerman, Ph. D., Ohio State University 



Columbus. October, 1906. 



LIBRARY 

 >'EW YORK 

 BOTANICAL 



GARDEN. 



A REAL MUSHROOM NUMBER. 



Through the kindness of Albert F. Woods, the Patholo- 

 gist and Physiologist of the U. S. Department of Agriculture, 

 it is possible to use in this Number, cuts published in Bulletin 

 No. 85, of the Bureau of Plant Industry on The Principles of 

 Mushroom Groiving and Mushroom Spazvn Making, by B. M. 

 Duggar, and to make extensive quotations from that interesting 

 and important work. The Bulletin may be obtained from the U. 

 S. Department of Agriculture and all interested especially in 

 Mushroom growing, are urged to send for a copy. 



Dr. Duggar treats his subject under the following heads: 

 Introduction. General Considerations, Market Conditions, Ger- 

 mination Studies, Review of Earlier Work, Experimental 

 \Vork, Tissue Cultures, Nutrition, Growth on Manure and 

 Other Complex Media, Growth on Chemically Known Media, 

 Tabulation of Special Results, Acid and Alkaline Media, Tem- 

 perature and Moisture, Preparation of the Compost, Installa- 

 tion of Beds. Spawning and Casing the Beds. Mushroom 

 Grow-ing, Experiments at Columbia, Mo., Variability in Mush- 

 rooms Grown Under Different Conditions, The Cultivation of 

 \"arious Species of Mushrooms, Co-operative Experiments, 

 Cave Facilities in the United States, Open-air-culture, Mush- 

 o room Spawn Making, A "Chance" Method, A "Selective" 

 2? Metho:l, Pure-culture Precautions, The Tissue-culture Method, 

 ^ The Commercial Process and The Vitality of Mushroom 

 _^ Spawn. Quotations as far as space allows follow : 



