LITERATURE CITED 
Arnold, C.A. 1931. On Callixylon Newberryi (Dawson) Elkins et 
Wieland. Contrib. Museum of Paleontology, Univ. of Mich. 3: 
207-232. 
—— 1941. The petrifaction of wood. The Mineralogist. 9: 323-324; 
SOO=SI0O% 
Bailey, I.W. 1938. Cell wall structure of higher plants. Indust. Eng. 
Chem. 30: 40-47. 
—— 1940. The walls of plant cells. Amer. Assoc. Adv. Sci. Publ. 
no. 14; 31-48. 
and E. S. Barghoorn. 1942. Identification and physical condi- 
tion of the stakes and wattles from the fishweir. (In Johnson et al. : 
The Boylston Street Fishweir.) Papers of the Robert S. Peabody 
Foundation for Archeology. 2: 82-89. 
and T. Kerr. 1935. The visible structure of the secondary wall 
and its significance in physical and chemical investigations of trach- 
eary cells and fibers. Journ. Arn. Arboretum 16: 273-300. 
and Mary Vestal. 1937. Significance of certain wood-destroying 
fungi in the study of the enzymatic hydrolysis of cellulose. Journ. 
Arn. Arboretum 18: 196-205. 
Barghoorn, E.S. 1948. Sodium chlorite as an aid in paleobotanical 
and anatomical study of plant tissues. Science. 107: 480-481. 
—— 1949, Paleobotanical studies of the fishweir and associated de- 
posits. Papers of the Robert S. Peabody Foundation for Archeology. 
(in press) 
and I. W. Bailey. 1938. Occurrence of Cedrus in the auriferous 
gravels of California. Amer. Journ, Bot. 25: 641-647. 
and David Linder. 1944. Marine fungi: Their taxonomy and 
biology. Farlowia. 1: 395-467. 
Cartwright, K. St. G. and W. P. K. Findlay. 1943. Timber decay. 
Biol. Reviews. 18: 145-158. 
Freudenberg, K. 1932. The relation of cellulose to lignin in wood. 
Journ. Chemical Education. 9: 1171-1180. 
Jahn, E.C. and W.M. Harlow. 1942. Chemistry of ancient beech 
stakes from the fish weir. (In Johnson et. al.: The Boylston Street 
Fishweir) Papers of the Robert S. Peabody Foundation for Arche- 
ology. 2: 90-95. 
[ 19 ] 
