IV CONTENTS 
Page 
The breeding habits of the weaverbirds: a study in the biology of behavior 
patterns, by dlerbert Priedmann--..= 222252522 -s2 oo See eee ee 293 
New Zealand, a botanist’s paradise, by Egbert H. Walker______________ 317 
The archeological importance of Guatemala, by A. V. Kidder__________- 349 
Excavations at the prehistoric rock-shelter of La Colombiére, by Hallam 
MGSO WIS Bisa 5, olan eo Ds ee ee ee ee pee 359 
Ronne Antarctic research expedition, 1946-1948, by Commander Finn 
Ronne aU Ore Neg hes. oe a te 2 Se ee ee ee ee pe ee 369 
whe staterot science, by Karl. ©, Compton=c- 22- = ee eee 395 
LIST OF PLATES 
Secretary 6. report: Lu atOs two: ess sk ee 2s Se a eee ee 54 
ihe formation of stars (Spitzer blates) jae 2) fe see ee ee one ee 160 
Whe origin of theyearth.@Page):, Plates Iai! ss. 2ei eee Se 166 
The 200-inch Hale telescope (Hubble): Plates 1-10________________-_-- 182 
Modern soil science (Kellogg): Plates 1,2. 225-5. 8 ee 246 
Animal behavior (Ernest Walker): Plates 1-16._..._..........._.._--- 278 
The breeding habits of the weaverbirds (Friedmann): Plates 1-8_______- 310 
New Zealand, a botanist’s paradise (Egbert Walker): Plates 1-10______- 326 
The archeological importance of Guatemala (Kidder): Plates 1-6__-_____- 358 
Excavations at La Colombiére (Movius): Plates 1-7_____.._--_________- 366 
Ronne Antarctic research expedition (Ronne): Plates 1-8_----_____--_--- 374 
