29 



FORMALIN AS A PRESERVATIVE OF 

 VEGETABLE TISSUES. 



BY E. MEAD WILCOX. 



(abstract.) 



A test was mabe to determine the most useful 

 strength of the solution to be employed. Three 

 strengths were used, a 1, 2, & 5 per cent, solution of 

 commercial Formalin (40 percent. Form-aldelyde.) In 

 these were preserved the fleshy fruits of several 

 common wild plants and the results obtained at the 

 end of six months are briefly presented here. In all 

 cases no more color was removed by the 5 per cent so- 

 lution than by the 1 or 2 per cent solution. The use of 

 1 per cent or even weaker is to be preferred therefore to 

 stronger solution. 



A 5 per cent, solution preserves Algae without the 

 slightest loss of color or shrinkage. All the material 

 used by my class in Vegetable Histology is preserved in 

 1 per cent Formalin and the tissues are in most excel- 

 lent condition for study. 



A NEW STATION FOR QUERCUS LEANA AND 



SOME REMARKS ON THE PARENTAGE 



OF THIS HYBRID. 



WALTER FISCHER, COLUMBUS, O. 



So far, four specimens hybrid oaks have been found 

 in Ohio, all of which seem to have at least one parent in 

 common. The first one was found near Cincinnati over 

 30 3'ears ago, and was described by Nuttal who named 

 it Quercus leana. It w^as regarded by Engiemann as a 

 hybrid between Quercus imbricaria and coccinea. 



