492 



AMERICAN JOURNAL OF BOTANY 



[Vol. 8, 



Table 15 



Same as shown in table 14, except that no Na 2 C0 3 was added. Solutions slightly 

 alkaline from the powdered glass. Thymol added to each tube. 



Same as shown in table 14, except that 2 cc. of 0.2 percent HC1 was added instead of 

 Na 2 C0 3 . 



Kind of Pollen 



Test 

 24 Hrs. 



Appearance of Solutions 



Unheated 



Autoclaved 



1 . Apple 



2. Corn 



3. Daisy 



4. Dandelion 



5. Dock 



6. Elm 



7. Goldenrod 



8. Lily, Easter. . . 



9. Lily, tiger 



10. Pine, Austrian . 



11. Pine, white. . . . 



12. Ragweed 



13- Rye 



14. Timothy 



15. Magnolia 



16. Maple, Norway 



+ 



+ 

 + 



No change 



Disintegration. Liquid pink 



No change 



No change 



Disintegration. Liquid pink 

 No change 



