STUDIES ON THE LIGNIN AND CELLULOSE OF WOOD, 43 * pe 
when used in testing the action of fungi upon its com- 
ponent parts. a 
MATERIALS USED. 
The present experiments were performed with freshly s 
cut wood taken from the stems of trees which, with but 5; ‘s 
few exceptions, were above six inches in diameter. Two 
sets of experiments were carried on: the first, of a prelimi- 8 
~ nary nature, included but a few species of wood; while in Saad 
3 the second, woods of about forty of the more common and 
a important timber trees were tested. Still later a number a 
of other species were examined for the presence of cellulose uy 
_ without performing the boiling experiments. es. 
The species of wood used in the preliminary experiments laa 
were;* Populus tremuloidus from New Mexico ; Pinus pal- ae 
ustris from Texas; Sassafras Sassafras, Taxodium dis- a 
tichum and Nyssa aquatica from Arkansas; Acer Sacchar- 
um, Quercus rubra, Hicoria ovata and Picea rubens from 
Vermont; Fraxinus Americana and Liriodendron Tulip- 
ifera from New York; and Larix Americana from 
Michigan. : Re: 
Further and more thorough tests were made later with a a 
much larger number of woods, including most of the im- a 
ae portant timber species of the country. ‘As will be per- vesleiiiaaia 
i ceived, those species which were utilized in the first 
experiment were also included in the later tests. The 
woods used in these last experiments are: Sassafras ee 
Sassafras, Taxodium distichum, Nyssa aquatica and 
Liquidambar Styracifiua from Arkansas ; Sequoia sem- ‘e 
pervirens, Sequoia Wellingtonia, Pinus Lambertiana, s 
tit 
Pinus ponderosa, Pinus flexilis and Pseudotsuga mucronata 7 
from California; Catalpa speciosa from Kansas; Tilia 
Americana, Populus balsamifera, Larix Americana, a 
_ * In naming the trees Professor Sargent’s recently published Mandal s 
of the Trees of North America is followed. 
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