THE STUDY OF MICROORGANISMS IN THE SOIL 89 



/. Cellulose-decomposing bacteria: 



54. Anaerobic cellulose decomposition in impure cultures (liquid). 



55. Number of aerobic cellulose-decomposing bacteria in soil. 



56. The thermophilic fermentation of cellulose. 



57. Isolation of cellulose-decomposing bacteria. 



58. The evolution of carbon dioxide from soil. 



A SUGGESTED LIST OF APPARATUS FOR ONE STUDENT 



The following apparatus should be in each desk. Any omission must be 

 reported to the instructor at once. 



1 Bunsen burner and tubing 



4 Wire baskets 



2 Metal cups 

 2 Funnels 



5 Erlenmeyer flasks (150 cubic centimeters) 



5 Glass tumblers 



10 Pipettes (1 cubic centimeter) 

 2 Pipettes (10 cubic centimeters) 

 1 Graduated pipette (5 cubic centimeters) 



1 Thermometer 



2 Platinum needles 



20 Object slides (not returnable) 



1 Hanging-drop slide 

 50 Cover glasses (not returnable) 



1 Aluminum weighing dish 



6 Evaporating dishes 

 1 Test plate 



1 Wash bottle 



Filter paper (8-inch) 

 1 Forceps (steel) 

 1 Spatula 

 1 SHde box 

 1 Test-tube brush 

 1 Towel 



1 Box of matches 

 1 Box of labels 

 1 Wax pencil 

 1 Microscope No 



(No. ...^. 



Objectives -j No 



I No 



1 Microscope lamp 



LABORATORY RULES 



Read carefully the following rules: 



Before pouring plates or making transfers, wash off the desk 

 with a 1 : 1,000 mercuric chloride solution. 



