CONTENTS XV 



PAGE 



Characters. Theory of Pangeneic Interchange. 

 Necessity of Pedigree Cultures. Mosaic Character 'of 

 Offspring of Hybrids. Mendel's Laws. Practical 

 Applications. Exceptions to the Rules. Significance 

 of Sexuality. Illustrative Studies 213-250 



CHAPTER XIV 

 THE PREPARATION OF SECTIONS 



Cutting Sections Free-hand. Cutting Sections with a Micro- 

 tome. Care of the Section Knife. Cytological Methods 

 -The Fixing Process. The Hardening Process. 

 The Process of Imbedding in Paraffin. Sectioning 

 Material Imbedded in Paraffin. Mounting Paraffin 

 Sections. Staining the Sections. Imbedding in Cel- 

 loidin. Staining Celloidin Sections. Making Perma- 

 nent Mounts in Glycerine or Glycerine Jelly 251270 



CHAPTER XV 



THE USE OF THE MICROSCOPE 



Adjusting the Microscope. Drawing to Scale from the 

 Microscope. Use of the Polariscope. The Use of 

 Reagents on Microscopic Preparations 271284 



CHAPTER XVI 



REAGENTS AND PROCESSES 285-329 



CHAPTER XVII 

 MICROCHEMISTRY OF PLANT PRODUCTS 330-367 



CHAPTER XVIII 



DETECTION OF ADULTERATIONS IN FOODS AND DRUGS . . . 368-374 

 INDEX . . 375-379 



