88 Dr. Faraday's Experimental Researches in Electricity : 







Barome- 



1 

 Thermo- 



Density of the 



Reading 





Date. 



Hour of ob- 



ter cor- 



meter in 



air from 



of the 



Remarks. 



1850. 



servation. ; 



rected to 

 32° temp. 



the lan- 

 thorn. 



P 



atrome- 

 tric ba- 

 lance. 



3 k(l + ei6°) 



April 12. 



h m 



8 7 A.M. 



in. 



29-55 



55-5 



•94257 



+2 3 



Rain, foggy. 





3 18 p.m. 



29-72 



60-9 



•93870 



3 35 





13. 



8 5 a.m. 



29-83 



55-3 



•95185 



1 3 







11 25 



29-83 



561 



•95045 



1 3 



Dark, but high fog. 





11 34 



29-83 



56-4 



•94993 



1 8 



Wind, lighter. 





7 40 p.m. 



29-73 



57-2 



•94536 



1 38 Dull, rainy. 





11 55 



29-67 



55-5 



•94639 



1 18 The same. 



15. 



7 55 a.m. 



29 43 



541 



•94115 



1 33 Dull, cloudy. 





3 10 p.m. 



29-26 



59-7 



•92618 



4 13[Has rained, uow sunshine. 





11 37 



29-22 



57-0 



•92948 



3 29 Clear, starlight. 



16. 



8 5 A.M. 



2912 



54-6 



•93039 



3 4 



Wind high, with rain. 





2 p.m. 



2905 



552 



•92713 



3 9 



Storm and rain. 





3 55 



29-00 



55-5 



•92502 



3 37 



High wind, sunshine. 





5 20 



29-01 



55-9 



•92466 



3 56 



Very high wind. 





11 10 



29-16 



54-8 



•93132 



3 7 



High wind. 



17. 



8 10 a.m. 



29-41 



53-3 



•94190 



2 16 



Bright, strong wind. 





1 35 p.m. 



29-50 



58-5 



•93582 



3 13 



Fair, sunshine, some wind. 





11 10 



29-69 



59-2 



•94065 



3 2 



| Starlight. 



18. 



8 6 a.m. 



29-86 



54-6 



•95403 



52 



j Bright sunshine. 





3 p.m. 



30-02 



63-2 



•94423 



3 52 



The same. 





IX. Experimental Researches in Electricity, — Twenty-third 

 Series. By Michael Faraday, Esq., D.C.L., F.R.S., 



Fuller ian Prof. Chem. Royal Institution*, 



§ 29. On the polar or other condition of diamagnetic bodies. 



2610. TjT^OUR years ago I suggested that all the phaeno- 

 -M_ mena presented by diamagnetic bodies, when sub- 

 jected to the forces in the magnetic field, might be accounted 

 for by assuming that they then possessed a polarity the same 

 in kind as, but the reverse in direction of, that acquired by 

 iron, nickel and ordinary magnetic bodies under the same 

 circumstances (2429. 2430.). This view was received so 

 favourably by Pliicker, Reich and others, and above all by 

 W. Weberfj that I hnd great hopes it would be confirmed; 

 and though certain experiments of my own (2497.) did not 

 increase that hope, still my desire and expectation were in 

 that direction. 



2641. Whether bismuth, copper, phosphorus, Sic. s when 



* From the Philosophical Transactions for 1850, part i. ; having been 

 received by the Ro.al Society January 1, and read March 7 and 14, 1850. 



t Poggendorff's Annaltn, January 7, 1848; or Taylor's Scientific Me- 

 moirs, vol. v. p. 477- 



