( Continued from f><n/e :i <>/' Cover.) 



VOLUME t3. 



1 MoRSB, H. W. — Studies On Fluorite I (IV Tr..- K.iMi...i-. I.iiiiiin.---,-neeof Fluorite. pp. 1-18. 



i |,i. Jane, r.^T. 35c. 

 •j. <;i.m Mw.i m i i New Specie niton from Mexico ; (IL) Robxbsox, 



11 i v • or otherwise Noteworthy Spennatophytes, chiefly from Mexico ; in 



son, B. L., end Bartlktt, II. H. — Ken Plants from Qeutemala end Mexico collected 



ohieflj bj 0. »'. Deem; n I lid, M. L. — Diagnoses of Nen Bpermatophytet from 



New Mexioo. pp. IT 68. June, 1907. 

 3. Mare, r i ... end Copblutd, m. — Maturation Btagea In the SiM-rmatogenesis <>f Vespa Macu- 



lata Linn. pp. 69 74 June, 1907. 16c. 

 A. Hem.. L. The Physiological Basis ol Illumination, pp. 76-86. Beptember, 1907. 30c. 

 6. i ii. -On the Determination Of the Magnetic Behavior -of the Fuel] Dividi 



an Electromagnet while a Stead] Current la being Established in the Exciting Coll. pp. 



'.'7 182. Beptember, 1907. 11.20. 



6. Snriii.F.MAOEN, C. L. B. — The Demagnetising Futon for OyUndricsl Iron Rods. pp. 183 



Beptember, 1907. $1.16. 



7. i. i:\u-. G. N. — Outlines of aXi-w System of Thermodynamic Ohemistry. pp.267 I iber, 



1907. 40c. 



8. Bakobb, 0. R . and Black, O. F. — The Quantitative Determination of Arsenic by the Outsell 



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



9. Sam, in, c. i:., and Black, <). F. -The Determination of Arsenic in Urine, pp. 326 



October, 1907. 26c. 



10. Richards, t \v.. and Wrrde, F. — The Transition Temperature of Manganoua Chiori.li-: A 



Net* Fixed Point in Thermometry, pp.841 360. November, 1907. 20o. 



11. K> . n \., and Avehy, A. II. Difference in Wave-Lengths of Titanium aa 3! snd 3918 



in Arc and 8park. pp. 361-361, November, 1907. 26c. 



12. li.iMKii, <;. P., and Wilson, J. H. — A Revision ol the Atomic- Weight of Lead. Preliminary 



Paper. The Analysis oi Lead Chloride, pp. 363-373, December, 1907. 16c. 



13 rn .... p . i.. w '. A Simple Method od Measuring the Intensity of Sound, pp.375 396. Febru- 

 ary, 1908. 30c. 



it. Tkowiik b, J. — longitudinal Magnetic Field and the Cathode Rays pp. 397-404. Febru- 

 ary, 1908. I5o. 



16. Hr.i.i,, L. — Note on Some Meteorological Uses of the Polarieoope. pp. 405-412. March, 



1908. 15c. 



1C. Parker, 6. H.— The Sensory Reactions of Amphioxns. pp. 413-465. April, 1908. 



it. Diokkt, W. P. - On Delays before ivaympiotts in Greek Tragedy, pp. 467-471. M.i\, 1908. 



1 Km iiards, T. W., and Rows, A. W. — A New Method for the Determination of the Spi 

 Heats of Liquids, pp. 478-488, June, 1908. 25c. 



