132 



THE AMERICAN MONTHLY 



[June, 



cases come to the middle lamella at the same point as those of 

 the neighboring cells. 



In the thick-walled cells of the ripe endosperm of many palms, 

 Mr. Gardiner demonstrated that extremely delicate threads not 

 only passed from tip to tip of the strands of protoplasm, but 

 through the thick walls as well. 



We give the names of those examined : 



Secondary Cortex. 



Acer platanoides, L. 

 yEsculus glabra, Willd. 

 Ailanthus glandulosus, Desf. 

 Alnus glutinosa, Gaert. 

 Amelanchier Canadensis, T. & G. 

 Amorpha fruticosa, L. 

 Berberis vulgaris, L 

 Betula alba, L. 

 Betula lutea, Michx, f. 

 Caljcanthus Floridus, L. 

 Caragana arborescens, Lam. 

 Carpinus Americana, Walt. 

 Carja alba, Nutt. 

 Castanea pumila, Mill. 

 Catalpa speciosa. Warder. 

 Celastrus scandens. L. 

 Celtis occidentalis, L. 

 Cladrastis tinctoria, Raf. 

 Cornus stolonifera, Michx. 

 Corjlus Americana, Walt. 

 Crataegus tomentosa, L. 

 Cytisus laburnum, L. 

 Dirca palustris, L. 

 Elteagnus hortensis, Marsch. 

 Euonvmus atropurpureus, Jacq. 

 Fraxinus sambucifolia, Lam. 

 Gaylussacia resinosa, T. & G. 

 Gordonia, sp. 



Gymnocladus Canadensis, Lam. 

 Hamamelis Virginiana, L. 

 Hydrangea paniculata, Siebold. 

 Ilex verticillata. Gray. 

 Juglans nigra, L. 

 Lonicera sempervirens. Ait. 

 Madura aurantiaca, Nutt. 



Magnolia acuminata. L. 



Menispermum Canadense, L. 



Negundo aceroides, Moench. 



Philadelphus coronarius, L. 



Picea nigra. Link. 



Pinus strobus, L. 



Populus alba, L. 



Prunus Americana, Marshall. 



Prunus Virginiana, L. 



Plelea trifoliata, L. 



Pyrus malus, L. 



Qiiercus alba, L. 



Rhus capallina, L. 



Ribes aureum, Pursh. 



Ribes rubrum, L. var. subglandulo- 



sum, Maxmi. 

 Robinia pseudacacia, L. 

 Rosa setigera, Michx. 

 Salix cordata, Muhl. 

 Sambucus Canadensis, L 

 Sassafras officinale, Nees. 

 Smilax hispida, Muhl. 

 Spiraea trilobata, L. 

 Staphylea trifolia, L. 

 Syringa vulgaris, L. 

 Thuya occidentalis, L. 

 Tilia Americana, L. 

 Ulmus Americana, L. 

 Viburnum opulus, L. 

 Vitis riparia, Michx. 

 Xanthorrhiza apiifolia, L' Her. 

 Xanthoxyllum Americanun, Mill. 



Endosperm. 



Iris versicolor, L. 

 Phoenix dactylifera, L. 



Glue ^A^ithout Heat.— Dissolve 50 parts of barium chloride 

 in 750 parts of cold water. Put into it 13 parts of gelatine or 

 glue. Let it stand 12 hours. Precipitate the baryta with sodium 



sulphate. 



o 



Liquid Paraffin dissolves camphor, 

 perfectly limpid with a little heat 



The solution becomes 



