iv CONTENTS. x 
Pratt; DS.) Roselle: sot: fcccte canter oe cred at ee eee ee 
Plates I and Il. 
REVICWS is sitet 2 Bee ihe ed ee Ee Ee Oe ne ee 
No. 4, August, 1912. 
Fanning, Paul R., and Eddingfield, F. T. The black sands of Para- 
Cale ie a. k the cias Soe i boe eae een Gere ety, 9 eae EO 
Plate I. Text figures 1 to 6. 
Fanning, Paul R. Geologic reconnaissance of northwestern Panga- 
Plates Ito IV. Text figures 1 to 5. Map 1. 
Adams, George I. Timor Islands; its supposed yoleano and its 
probable tectonic relations -..........-.-..-----..---- Geteie ith Se 
Text figure 1. 
Editorial: A Philippine natural bridge —-.....-...-..--22.22--2-2--ee-eeeceeeeeeeeee 
Text figure 1. 
No. 5, October, 1912. 
Cox, Alvin J. The oxidation and deterioration of coal... 
Text figures 1 and 2. 
Cox, Alvin J., Reibling, W. C., and Reyes, F. D. Sand-lime brick and 
artificial sand stones in the Philippines -—.......--.0- 
Plates Ito VIM. Text figure 1. 
Thurlow, L. W., and Pratt, D. S. Extraction test of a modern sugar 
Central eo: as le ae ee se. 
Plate I. 
No. 6, December, 1912. 
Gibbs, H. D., and Pratt, D. S. The absorption spectra of ortho- 
and para-nitrophenol and para-nitrosophenol. New evidence of 
the quinoid structure of these compounds in alkaline solution........ 
Plates I to IV. Text figures 1 to 3. 
Gibbs, H. D., and Ageaoili, F. Philippine citrus-fruits: their com- 
mercial possibilities and a chemical study of a few of the most 
important): Vanieties yc cee. ee eet occ et at see nce 
Plates I to V. 
Gibbs, H. D., and Ageaoili, F. Some Filipino foods ..........-.......---....-..... 
Plates I to VI. 
Editorial: A new type of laboratory condenser for use with volatile 
liquids}initropicalMlaberatonies 2. ee 
Text figure 1. 
9X0 (=>: ime eee ere SCP ce VE Pine a ERE IESE OSs OTR SEER et science sabe se 
255 
283 
291 
297 
317 
371 
403 
383 
