CONTENTS 



No. 1, February, 1913 



Page. 



Gibbs, H. D., Williams, R. R., and Galajikian, A. S. Methyl 



salicylate IV. The saponification of methyl salicylate, methyl 



benzoate, and the methyl ether of methyl salicylate 1 



Text figures 1 to 5. 



Gibbs, H. D., and Pratt, D. S. The mutual influence of hydroxyl 

 and carboxyl and some related groups in the ortho position. 

 A study of the absorption spectra of phenol, o-cresol, o-hydroxy- 

 benzyl alcohol, salicylic acid and its methyl ester, methyl ether 

 of salicylic acid and its methyl ester, benzyl alcohol, benzyl 

 acetate, benzyl methyl ether, benzyl chloride, and methyl ben- 

 zoate : 33 



Text figures 1 to 6. 



Pratt, D. S., and Gibbs, H. D. The absorption spectra of pheno- 

 quinone, 2, 5-dianilinoquinone, 2, 5-dianilinoquinoneanil, and 2, 

 5-dianilinoquinonedianil (azophenine) 51 



Text figures 1 and 2. 



Pratt, D. S., and Del Rosario, J. I. Philippine fruits: Their 



composition and characteristics 59 



Plates I to XVI. 



No. 2, April, 1913 



Eddingpield, F. T. Ore deposits of the Philippine Islands 81 



Plates I to m. Text figures 1 to 4. 



Reibling, W. C. A bonus system for the purchase of Portland 



cement „ 107 



Eddingfield, F. T. Alteration and enrichment in calcite-quartz-man- 



ganese gold deposits in the Philippine Islands 125 



Eddingfield, F. T. Gogo, Entada scandens Bentham, and its effect 



on gold and gold solutions 135 



No. 3, June, 1913 



Agcaoili, Francisco. The composition of various milks and their 



adaptability for infant feeding 141 



Plate I. 



Dovey, E. R. The composition of carabao's milk 151 



Tempongco, Clodoaldo. Sugar-cane experiments 159 



Pratt, D. S., and Gibbs, H. D. The two phthaloximes : A study 



of their absorption spectra and constitution 165 



Plates I and II. Text figures 1 to 6. 



Pratt, D. S. The optical efficiency of tinted glasses in relieving 



eye strain 193 



Plate I. 



iii 



