86 THE ROYAL SOCIETY OF CANADA 
Sanio, Karu. 
(29) Anatomie der gemeinen Kiefer (Pinus silvestris L.) Jahrb. wiss. Bot. 
Bd., IX, p. 50. 
SCHROEDER, JULIUS. 
(30) Das Holz der Coniferen. Dresden, 1872. 
SCHULTZ, PAUL. 
(31) Des Markstrahlengewebe und seine Beziehung zu den leitenden Ele- 
menten des Holzes. Bot. Centralb., Bd. XII, 1882. 
STRASBURGER, EDWARD. 
(32) A Text Book of Botany. Third English Ed., London, 1908. 
(33) Histologische Beitrage, Heft III, Jena, 1891. Ueber den Ban und die 
Verrichtungen der Leitungsbahnen in den Pflanzen. 
THomas, FRIEDRICH. 
(34) Zur vergleichenden Anatomie der Coniferen-Laubblatter. Prings. 
Jahrb. wiss. Bot., III. 
(35) United States Department of Agriculture, Forestry Division, Bulletin 
No. 8, 1893. A Chemical Study of the Resinous Contents and their 
Distribution in Trees of the Longleaf Pine before and after Tapping 
for Turpentine. By M. Gomberg. 
(36) U. S. Dept. of Agriculture, Division of Forestry, Bulletin No. 13, (Re- 
vised Edition), 1897. Introduction by B. E. Fernow. 
(37) U.S. Dept. of Agriculture, Forestry Division, Bulletin No. 13, (Revised 
Edition), 1897. The Longleaf Pine. By Charles Mohr, Ph.D. 
WIGAND, A. 
(38) Ueber die Desorganisation der Pflanzenzelle, insbesondere ueber die 
physiologische Bedeutung von Gummi und Harz, Jahrb. wiss. Bot., 
Bd LIL p.115; 
Drawings. 
Fig. 1.—Pinus banksiana, Cross section near base of a shoot collected June 21, 
1907. Showing a medullary ray, m.r. and the initiation of a resin canal, r.c. in the 
region of the protoxylem, pr. x. ca., cambium; ep. epithelial cells; x, secondary 
xylem, x 644. 
Fig. 2.—Pinus banksiana, Cross section near base of a shoot collected June 21, 
1907. Shows a medullary ray, m.r., extending from the bast, ph., to the pith, p.c.; 
and the formation of two groups of parenchyma cells containing resin canals, r.e. 
x 644 
Fig. 3.—Pinus strobus. Radial section near apex of a shoot collected June 21, 
1907. Medullary ray m.r. extending from phloem, ph. to protoxplen, pr. x. shows 
characteristic appearance of medullary ray cells when first laid down. x 372. 
Fig. 4.—Pinus strobus Radial section from the base of the shoot that Fig. 3 
is drawn from. Illustrating a somewhat later stage than that represented in Fig. 
3. x 322, 
