Contents 
Yates, Harry §. The growth of Hevea brasiliensis in the Philippine 
PERT sti) gpupeee oe cae ree tense hele SPATE UC AGETEN Sipe Sue dear ar "runt ep Ge WAM e Sha Nr Oe TO 
One text figure. : 
UICHANCO, LEOPOLDO B. A sctigleed and systematic study of Phil- 
pee to egy Cs k ge «811 aptconaeeere it pent esspencny uberis em ah Mes ery ot) marstise en ne rp 
Fifteen plates. 
COCKERELL, T. D. A. The sphecodine bees of the Philippine Islands.... 
No. 6, June, 1919 
[Issued December 16, 1919.} 
Kinc, ALBERT E. W. The mechanical properties of Philippine bast- 
1S 90 1, Same ee asa ae sre tort en ele ay orm EP Tremere er oer karen tO” ferret Pee 
Five plates and two text fais 
Lee, H. ATHERTON, and YATES, Harry S. Pink disease of citrus........ 
Seven plates and two text figures. 
ERRATA st a es ES eee en ate eee OE Suid vas cewctn cae 
TT a or See eens : Pies 
