586 G. W. Hawes—Composition of the wood of Acrogens. 
Carbon. Hydrogen. Oxygen. Nitrogen. 
6°62 43°15 1°44 
Lycopodium dendroideum, 48°7 3 100 
Lycopodium comp 48°35 6°61 43°09 1°95 100 
Equisetum hyemale, 47°54 6°74 44°45 1°27 100 
Aspidium marginale 47°18 6°35 44°30 217 100 
Cyathea canaliculata, section, 49°08 6°66 43°05 1:21 100 
“cortical” part, 52°04 5°26 41°18 1°52 100 
Sphagnum (Websky), 49°88 6°54 42°42 116 100 
Oak (Payen), 50°00 6°20 43.80 100 
Beech 4 49°25 6°10 44°65 100 
Ebony e 52°85 6°00 41°15 100 
come within the limits of variation, not only of the different 
__ to such woods more striking, although it does not differ essen- 
tially from some of the oak woods which have been analyzed. 
