112 THE ESSEX NATURALIST.
fication. By the use of such methods it may prove possible,
in time, to discover the causal fungus ; if it prove to be one that
has not been investigated the mycologist will seek to confirm
his conclusions by attempting to inoculate sound wood with
the suspected species, for by so doing he might reasonably
expect to produce the same symptoms as those in his original
specimen. Here, of course, it has been assumed that one fungus-
only is present ; in practice it would be necessary to confirm this.
It is not suggested that all the criteria mentioned above are-
used in identifying a wood rot ; sometimes one or two more or
less unique features are sufficient, but at times all the criteria
must be used before an attempt is made to identify the fungus.
Further, it is not suggested that these methods will enable every
fungus to be identified with accuracy ; as yet it is rather premature
to prophesy how useful they will prove when our knowledge of
wood-rotting fungi becomes more extensive ; nevertheless there
can be no doubt that so far these new methods have met with a
remarkable degree of success.
BIBLIOGRAPHY.
Works marked with an asterisk contain extensive bibliographies.
1. Bose, S. R. and Sarkar, S. N. 1937. Enzymes of some Wood
Rotting Polypores. Proc, Roy. Soc, B, 123, 193-213.
2. Brown, H. P. 1915. A timber rot accompanying Hymenochaete
rubiginosa. Mycologia, 7, 1-20.
3. Campbell, W. G. 1930. The Chemistry of White Rots of Wood,
I., Biochem, J., xxiv., 4, 1235-43.
4.-------------. 1931. The Chemistry of White Rots of Wood, II.,
Biochem, J., xxv., 6, 2022-7.
5. Cartwright, K. St. G. 1937. A reinvestigation into the cause-
of " Brown Oak " Fistulina hepatica (Huds) Fr. Trans. Brit.
Myc. Soc, xxi., G8-83.
6. Cartwright, K. St. G., and Findlay, W. P. K. 1930. The
Diagnosis of Decay in Timber. Emp. For. J., 9, 2, 190-203.
7. -------------. 1934. Studies on the Physiology of Wood Destroying;
Fungi, II. Temperature and Rate of Growth. Ann. Bot., 48,
481-95.
*8. -------------. 1936. The Principal Rots of English Oak. London.
*9. Eades, H. W. 1932. British Columbia Softwoods, their Decays
and Natural Defects. Forest Service Bull. 80, Dept, of the
Interior, Canada.
10. Falck, R. 1909. Die Lenzitesfaule des Koniferenholzes, Haussch-
wammforschungen [Moller], 3 : xiii.-xxxii., 1-234.
11. -------------. 1912. Die Merutiusfaule des Bauholzes, Hausschwamm-
forschungen [Moller], 6: i.-xvi., 1-405.