20 



APPARATUS AND METHODS. 



walls. In each case apply first the dye which is to remain in the 

 lignified walls. In the following list the dye named first in each 

 pair is that which stains the lignified walls, while the second stains 

 the cellulose walls : safranin and aniline blue ; safranin and acid 

 green ; iodine green and acid fuchsin ; iodine green and carmalum ; 

 cyanin and Congo red. 



Various dyes are referred to in the Appendix and in other parts 

 of this book, but it should be remembered that very good general 



Fig. 11. Mounting Cabinet (Flatters &: Garnett), fitted with accessories 

 for microscope work, stains, reagents, etc. 



work may be done without having resort to more than a very few 

 of these stains, in addition to the reagents used in making tem- 

 porary preparations. All the stains can be purchased in solution, 

 ready for use. 



Fig. 1 1 shows a most convenient and well-fitted mounting cabinet, 

 supplied by Messrs. Flatters & Garnett. It contains a large selection 

 of reagents and stains, in addition to a complete outfit of accessories 

 for microscope work. Full particulars may be obtained from the 

 makers (see Preface). 



18. Moist Chamber Slides. For the germination of 

 spores and the growth of pollen-tubes, kept under obser- 

 vation in a hanging drop of culture solution, there are 



