332 Mr Potter, On the nitrogenous reserve-materials [Feb. 26, 



cerning the nature and form of organic nitrogenous substances 

 in other depositories is incomplete. 



With a view to determine the form in which nitrogenous 

 organic substances are deposited in Bulbs, Buds, Rhizomes, and 

 Roots, and to ascertain if grains similar to Aleurone grains are 

 deposited in these, I have examined the following cases. 



First, Buds : 



Fagus Sylvatica. 

 Vitis Vinifera. 

 Convallaria Majalis. 

 Pyrus Aucuparia. 

 Acer Pseudo Plantanus. 



And the buds of a species of 



Corylus. 



Pyrus. 



Crategus. 



Magnolia. 



Alnus. 



In these I have been unable to find any trace of granular nitro- 

 genous deposits, though often considerable quantities of Starch 

 were found deposited, and the young meristematic cells were quite 

 full of contents. 



Second, Rhizomes : 



Equisetum Arvense. 

 Epilobium Hirsutum. 

 Acorus Calamus. 

 Polygonatum Vulgare. 

 Ptei'is Aquilina. 

 Rumex {species of). 

 Iris Tuberosus. 

 Ophioglossum Vidgatum. 



Third, Tubers and Corms : 



Ranunculus Ficaria. 

 Bunium Flexuosum. 

 Arum Maculatuin. 

 Colchicum Autumnale. 

 Gymnademia Canopsia. 

 Dendrobium Cannazfolia. 

 Cwlogyne Cristata. 

 Helianthus Tuberosus. 

 Phajus Grandiflora. 

 Crocus. 



