40 



MUSHROOM GROWING AND SPAWN MAKING, 



invariably obtained when the conditions were nnfavorable — that is, 

 when they were beyond the limits which have been more or less 

 definitely stated as requisite. On the other hand, the results which 

 are pven do not represent the best yields obtained; they are those 

 which seem to be most instructive. 



The experimental work has been seriously handicapped in one par- 

 ticular. With only one set of experiments (those recorded in Table 

 VIII) has it been possible to maintain a temperature constantly 

 between 50° and 60° F. Unfortunately a north basement room 

 which gave those results during the winter of 1903-4 has not since 

 been available for the work. The results are, however, comparative 

 when not absolute. 



The results given in Table VIII are referred to in various parts 

 of this bulletin. Attention should be directed to the fact that many 

 of these beds were yielding well when the experiment was neces- 

 sarily closed to make room for a second series of experiments 

 planned during the same winter. Beds Nos. 6, 9, 13, 25, and 40, for 

 instance, each yielded between 8 and 15 ounces the clay the experi- 

 ment was closed, while beds Nos. 2, 10, 14, 23, 26, 30, and 37 each 

 yielded 1 jDOund or more on the same day. 



It is to be noted that a considerable number of beds in this series 

 produced more than 1 pound per square foot, and some nearly 

 2 pounds for a similar area. It is certain that some beds would 

 have yielded more than 2 pounds if they could have been per- 

 mitted to produce longer. 



Table VIII. — Yields of experimental mushroom heds. 



ft 



a 



8 



9 



10 



11 

 12 



Material used in 

 the bed. 



F ermented 

 horse manure. 



do 



do 



..do. 

 ..do. 

 ..do. 



..do. 



.do. 

 .do. 

 .do. 



do 



Fermented 

 horse manure 

 (bed left for 2 

 months before 

 beingspawned) 



Source of the spawn. 



Alaska, old . 



market 



Old American made 



English, current year 



product. 



English, 2 years old 



English, 1 year old.. 



Alaska, U. S. Department of Agri- 

 culture. 

 Bohemia, U. S. Department of 



Agriculture. 

 Mixed varieties, U. S. Department 



of Agriculture. 

 Bohemia. U. S. Department of 



Agriculture, light spawning. 

 Bohemia. U. S. Department of 



Agriculture, heavy spawning. 



Agaric us (imi/gdalinHs, old .■ 



Bohemia, U. S. Department of 



Agriculture. 



o 



ftod 



pi 



m 



27 



104 

 51 



.51 

 53 

 51 



68 

 46 



61 



47 

 48 

 78 

 102 

 71 



!3 



o 

 o 

 a 

 zn 



tn ■ 



O) CO 



;;' K*i 

 pins 



2 



53 54 



20 



7 



17 

 34 



65 



tc 



03 



m a 



OS 

 •S ft 



107 



20 



7 











115 



65 



112 



102 



136 





 5 



m 

 ft 



0) 

 S) 



m 





u 

 <a 

 ft 



ai . 



o O 



a o 



O <E 



9 ^ 



■" a* 



m 



2 



6 

 6 



6 

 6 

 6 



5 



6 



6 



6 



6 

 6 



18.0 



3.6 



1.0 



0.0 

 0.0 



18.8 



13.0 



18.6 



17.0 



22.6 



0.0 

 0.8 



