No. 2, March, 1921] UNCLASSIFIED PUBLICATIONS 225 



1515. Hartridge, Hamilton. Microscopic illumination. Jour. Quekett. Microsc. Club. 

 Ser. 2. Vol. 14: 73-88. Fig. 1-2. — The subject is discussed under the following headings, (I) 

 theoretical aspect of microscopic illumination, (II) position of critical illumination, (III) alter- 

 native methods of illumination, (IV) experimental comparison between different methods of 

 illumination, (V) relative advantages of different methods, (VI) practical applications. — 

 Leva B. Walker. 



1516. Herdmax, W. a., H. H. Turner, E. B. Knobel, and W. W. Bryant. The cost 

 of scientific publications. Nature 105:326-327. 1920. — Four separate communications. 



1517. Herzog, R. O. tJber einige Fragen der Faserstoffschemie. [On a few questions 

 in the chemistry of fibres.] Naturaissenschaften 8: Heft 34. 673-681. 1920. 



1518. Holland, T. H. The organization of scientific work in India. Nature 105: 452- 

 453. 1920. — A reply from the {)resident of the Indian industrial commission to opinions 

 expressed in previous numbers of Nature. Refers especially to botanical survej' and forest 

 botany. — O. A. Stevens. 



1519. Holman, R. M. Contributions of Botany to Military Efficiency. Pi-oc. Indiana 

 Acad. Sci. 1918:49-55. 1920. — The author discusses some of the waj^s in which Sphagnum, 

 Pathology and Forestry helped to solve difficult war problems. — F. C. Anderson. 



1520. Hoxie, Frederick J. Arrangement of heating pipes an important factor in decay of 

 factory roofs. Trans. Amer. Soc. Heat and Ventilating Eng. 25: 15-24. 12 fig. Jan., 1919. 

 — Increasing the amount of heat near a roof may be resorted to instead of increasing the insu- 

 lation to prevent the loss of heat and the consequent precipitation of moisture. The pipes 

 are commonly placed beneath the w-indows of the sawteeth with the result that the warm 

 moisture-laden air is circulated against the cooler windows and roof, and water thus precipi- 

 tated upon the roof. The heating pipes should be placed near the roof to keep the planks 

 warm and dry and prevent air circulation. — Walter H. Snell. 



1521. Kellog, V. The United States national research council. Nature 105: 332-333. 

 1920. — Brief statement of purpose and organization. — O. A. Steveiis. 



1.5-2. MuiR, F. Makiling [Luzon] as a biological station. [Rev. of: Muir, F. The Der- 

 bidae of the Philippine Islands. Philippine Journ. Sci. D, 12:50-52. 1917.] Philippine 

 Agric. 8: 17-18. 1919. 



1523. Nicholson, W. A. Oenanthe crocata L. Jour. Botany 58: 201. 1920. — The ques- 

 tion whether the juice becomes yellow when e.xposed to the air is discussed. — K. M. Wiegand. 



1524. Rogers, Leonard. Organization of scientific work. Nature 105: 292. 1920. — An 

 argument against centralized control. — 0. A. Stevens. 



1525. Sauvageau, Camille. Utilization des algues marines. [Utilization of marine 

 algae.] Encyclopedie scientifique. 39^ p. O. Doin: Paris, 1920. 



1526. Trelease, S.\m F., and Forman T. McLean. Mount Makiling [Luzon] as a station 

 for botanical research. Philippine Agric. 8: 6-16. Frontispiece and 5 pi. 1919. 



1527. Trelease, William. Botanical achievement. Science 51:121-131. 1920. — An 

 address by the retiring President of the Botanical Society of America, at St. Louis, Dec, 31, 

 1919.— A. H. Chivers. 



