>i til, it.il /in m ;<>»</«• .'»' a] <tivrr.) 



VOLUME 13. 



I. I. W. — Studies •>■! Fluorit.- IV Tin- Katli...l..-I.iuiiiii.-.-. en.e of Pluorite. pp. 1-16. 



I [.1 Jane, l'.»07. I'm-. 



J. Gk>:knm an, J. M. (I ) New 8|«-. i. iiilv i, from Mei iio ;( 1 1. ) RobOmH 



B i. New or otherwise Notevforthy Bpermatophytee, chiefly 1 ill. i 



it. 1... uid luini.K.n. II H Rett Plants from Qautemala and M il.-cted 



chiefly i>v 0. 0. Deem; iv.i Feknai.i., M. L. - ..( n,-» Bpermatophytea from 



Mexico, pp. 17 (is .Tune, 1 IX »T . 60c. 



3. Maze, I i . wd GoramH>,M. - Maturation Stages in the Bpermatogeneaii • ■( v<-pu Mac# 



lata Linn. pp. 69-74. Jane, I'.mT. I 



4. i:mi.i The Physiological Baaia of Illumination, pp. 76-96. Beptember, 1907. 30c 

 6. Punas, B. O. - On the Determination of the Magnetic Behavior ••! tl»- Fine)) Divided Core 



an Electromagnet while a Bteadj Onrrent la being Bstabliahed in the Exciting Coil, p 

 :»T-is-j. September, r.H>7. n.ao. 



6. BHDDouueair, C. L. B. — The Demagnetising Factor* for Cylindrical Iron Bods, pp. 183-! 



Beptember, I'.hi;. $1,16. 



7. Lawn, G.N -outline-, of a New System of Thermodynamlo Chemistry, p] n.tobt 



V.M.7. 40c 



8. Sanger. C, K . and Bun k. O. f The Qnantitative Determination of Arsenic bj the (iut/e 



•Method, pp. 295-324. 2 pi October, 1907. 40c. 



9. Bangui, C. i;., and Hi.ac k. O. F. The Determination of arsenic in Urine, pp. 326-8fj 



tober, 1907. 25c. 



10. Kkiiaiu.s, t. \\\. and Wbbdb, V The Transition Temperature ol Manganotia Chloride:] 



New Pixed Point in Thermometry, pp. 341 :<v.. November, t.h«t. 20a 



11. Kent, x. A., and Avery. A H. Difference in Wave-Lengths ol Titanium *A 3900 an.l 39af 



in Arc- and Spark, pp. :»",i 361. November, 1907. 26c 



12. Baxtkr, G. P., ami Wilbost, J. II. — A Bevision of the Atomic Weight ol Lead. Pr.-liminsfl 



Paper. The Analysis oi Lead Chloride, pp December, 1907. 



13. I'ikli i, o. \v.— a Simple Method of Measuring the Intensity of Souiul. pp. :<'■'■ ■'••"■. Kei.ro. 



an, 1908. 30c 



14. Tki.wuhii.qe, J. — Longitudinal Magnetic Held and the Cathode Bay* i-p •'" •"»• Febre> 



ary, 1908, I5c 



16. Bsix, L. Note on Borne Meteorological Uses of the I'oiaris.-ope. pp. -i< >.".--* l *_'. M 



1908. 16c 

 it'.. Parker, O. H.— The Sensory Reactions of Amphiozus. pp. 413-466. April. 1908. 



17. Diokrt, W. P. - On DslayB before ayayvwp^o-etf in Oreek Tragea.v pp. 4.".7 471 M..... r.*'8. 



•_'5c. 



