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 . . 251—270 



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 . ... 271—284 



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 



