Xll CONTENTS 



Page 

 CHAPTER XXXVI.— Non-parasitic, or Physiologic Plant Diseases.. . 564 

 Classification; Stag-head; Root Asphyxiation; Desiccation; Water-logging; 

 (Edema; Frost Necrosis; Apple Fruit Spots; Water-core of Apple; Die- 

 back, or Exanthema; Mottle-leaf; Curly-top of Sugar Beets; Peach Yel- 

 lows; Tip-burn of Potato; Leaf-casting; Curly-dwarf of Potato; Bean 

 Mosaic; Mosaic of Tobacco; Bibliography. 



PART IV. LABORATORY EXERCISES IN THE 

 CULTURAL STUDY OF FUNGI 



CHAPTER XXXVII.— Laboratory and Teaching Methods 581 



Introductory Remarks; Lesson i, Micrometry; Lesson 2, Plugging Test- 

 tubes, etc.; Lesson 3, Microscopic Study of Culture Material; Stains; 

 Lesson 4, Liquid Nutrient Solutions; Lesson 5, Potatoes as Medium; Lesson 

 6, Solid Vegetable Substances; Lesson 7, Plant Juices; Lesson 8, Milk, Beer- 

 wort; Lesson 9, Bouillon; Lesson 10, Eggs; Lesson 11, Nutrient Gelatin; 

 Lesson 12, Agar-Agar; Lesson 13, Various Nutrient Agars; Lesson 14, 

 General Directions tor Making Plant Agars; Lesson 15, Potato Juice Agar; 

 Lesson 16, Starch Agar; Lesson 17, Culture Media for Nitric Organisms; 

 Lesson 18, Standardization of Culture Media; Lesson 19, Germination 

 Studies; Lesson 20, Counting of Yeasts and Bacteria; Lesson 21, Cultiva- 

 tion of Yeasts on Gypsum Blocks, Method of Pouring Plates, Streak 

 Method; Lesson 22, Isolation of Fungi; Lesson 23, Water Analysis; Lesson 

 24, Methods of Identification; Lesson 25, Plate Counter; Lesson 26, Sys- 

 tematic Bacteriology; Lesson 27; Scheme for the Study of Bacteria; Lesson 

 28, Detailed Study of Bacteria; Lesson 29, Directions for the Study of 

 Pathogenic Fungi. 



CHAPTER XXXVIII. — ^Laboratory and Teaching Methods (Continued) 643 

 Lesson 30, Inoculation Experiments; Lesson 31, Do.; Lesson 32, Do.; 

 Lesson 33, Do.; Lesson 34, Do.; Lesson 35, Experiments with Artificial 

 Wounding of Plants; Lesson 36, Gas Injuries; Lesson 37, Enzyme Diseases; 

 Lesson 38, Study of Mistletoe; Lesson 39, Wire Worms in Plants; Lesson 40, 

 Relation of Light to Pathogenic Conditions; Lesson 41, Withering, or Wilt- 

 ing of Plants; Lesson 42, Methods of Sectioning, Celloidin, Paraffin; 

 Lesson 43, Freezing and Cutting of Material; Lesson 44, Use of Drawing 

 and Projection Apparatus, Drawing Methods; Lesson 45, Suggestions to 

 Teachers and Students; Lesson 46, Content of Field Trips and Excursions. 



APPENDIX I.— Fungicides. 669 



Bordeaux Mixture, etc. 



APPENDIX II.— Spray Calendar ..." 68c 



APPENDIX III. — Antisepsis and Disinfection . , 692 



Preservation of Woods. 



