552 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
ing to the experience of the author, is constantly present in the most 
different kinds of wood. It is suggested that the" hadromal is a 1, 3, or 
Fig. 144. 
4 substitution product of benzol, and that the constituent of woody mem- 
brane which causes the lignin reaction is a hadromal-cellulose-ether, 
together with a very small quantity of free hadromal. 
Fig. 145. 
Microchemical Test for Phosphorus.* — Dr. G. Pollacci had pre- 
viously shown that the presence of phosphorus in vegetable tissue is 
microchemically demonstrable by means of a mixture of ammonium 
molybdate and nitric acid and an aqueous solution of chloride of tin 
* Atti 1st. Bot. r. Univ. Pavia, vi. (1898) 8 pp., 1 pi. See Bot. Centralbl., lxxix. 
(1899) pp. 11-12. Cf. this Journal, 1895, p. 249. 
