uthui-ti i,;.»> fit,,. :; <■] Cover.) 



VOLUME 13. 



i m. .;.-i' ii W. Btudies on FInoritc R The Kathodo-Lumin* Fluorite. pp.1 1& 



1 pi. .Inn.-. r.OT 



i \] i ». « B] ■ '/"" from " 



i; i, ,N,. A orotuerwi e Noteworthy Bpermatophyta .chiefly from M 



i i and Babtlbtt, H. H. Sew Plant* from Gautemala 

 chieflj I'.v 0.0. Deam; IV.) Kkhnu.i., M. L. Diagnose* 01 Sew Bpermatophyl 

 Mexico, pp 17-68 June, ivx >7 60c. 

 B. ' iF.i.AM., M - M tuition Stage* in the 8pen pa Macu- 



late. Linn pp. 69-74 June, 1907. i 

 i luii.l. The Physiological Basis o( Illumination, pp.76 tember, 1907 80c. 



Peuob, B. O. On the Determination ><1 tli" Magnetic Behavior "I the Finely Divided Core "f 

 an Electromagnet whili Ourren! is being K tablished in tli«- Exciting CoiL pp. 



97 182. September, 1907. $1.20. 

 B, smi.i.i MuiEN. C L. B. — The Demagnetising Factors for Cylindrical Iron Rods, pi 



mber, 1907. |1 15. 

 7. i \. - Outlines of a New System of Ther lynamic Chemistry. i-i»- 267 '-'■' "•■ "'■' 



1907. Hi.- 



.v. u , and Black, P. —The Quantitative Dei irmination of Arsenic by the Gi 



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



9. SvMiiu. 0. K, and Black, O. F. The Determination of Arsenic in Urine, pp 

 (p tobi r. 1907. 26c. 



10. Richards T V7., and Wr*di,F.— The Transition Temperature oi Manganons Chloridi \ 

 Sen Fixed Point in Thermometry, pp :ui 360 November, 1907. 20o. 



U. Khut, S. A., and Avkby, A II. Difference in w ive Lengths ol Titanium AA 3900 nw\ 

 in Arc an i Spark pp. 361-361. Sovember, 1907. 



12. Baztbb, (i P., and Wilson, J. H. — A Revision ol the Atomic Weight of Lead. Preliminarj 

 Paper. The Analysis of Lead Chloride. p| Deoei ,1907 IBc. 



13 i-ikict. «. v7. A Simple Method of Measuring the Intensity of Sound. pp,87ff-395. Febru- 

 ary, 1908. 30c. 



14. Trowbbidob, J. — Longitudinal Magnetic Field and the Oathode Rays pp.397 i"i Febru- 

 ary, 1908. 15c. 

 16. Bell, 1. Sote on Som.- Meteorological Uses of H»' Polaitaeope. pp. 405-412. March, 



1908. 16 



16. I'ahker, G. H. — The Sensory Reactions of Ampbloxos. pp. 413-455. April, 1908. 1"'. 



