C1 

 PREFACE TO THIED EDITION. 



U'V' 



AN entire revision of the text has been made in this new 

 edition. Information regarding the microscope, its acces- 

 sories and methods of manipulation, have been brought 

 into line with present-day knowledge and practice. 



The instructions for preparing and mounting microscopic 

 objects have been extended and are more varied. 



A third part has been added on the subject of the choice 

 and use of microtomes, for which we desire to express our 

 special thanks to Mr. G. West, of the Botanical Laboratory, 

 Edinburgh. The directions given are compressed within 

 narrow limits, and are designed especially to aid the 

 beginner. Acknowledgments are also due to the pub- 

 lishers of Knowledge, of 326, High Holborn, for permission 

 to use several notes and articles which have appeared in 

 their columns, and to numerous friends who have con- 

 tributed their kind advice and suggestions for the improve- 

 ment of the book. 



M. I. C. 



M. J. C. 



LONDON, 



November, 1902. 



