230 ^journal of Experiments, 3 Jan. 1772 



Short wires at 36 inches distance. Proportion 



Single wire without glass. 



B- 3isep. 

 A - 191 do. 

 A -19 sep.less 



B- 3isep. 13-10 



A - 191 do. 17-89 



B- 4 do. 13-34 



Two wires at 18, repeated. 



Th. 52. S. H. 18. C. H. 44. 



By theory [Art. 152], the proportions should be between those of 



i -9323 -9053 -8827 



and i -8926 -8597 -8353 



478] Comparison of different substances tried in the usual manner*. 

 The large tin circle suspended by silk. 



B- 4jsep. [Article] 



B-^*-* ,. I5 . 85 w 



B- 5 do. 

 The globe suspended on silk. 



A: 4 %% ** w 



Coated double glass plate Af. 



A -20 do. 18-11 fr t] 



B - 5J do. 14-06 



Double plate B. 



":/ r 3S "* w 



The large circle supported on waxed glass. 



B: 2 6 } 



A tin plate 15-5 square, on do. 



B - 5 

 A - 20 



A tin plate 17-9 by 13-4, on do. 



~ 2 , l8 '^ 4-05 16-08 [7] 



B - 5i 14-06 



* [See Arts. 653, 654, 682.] 



f Double plate ground glass A, thickness -3, diam. coating 1-82, comp. power 11-04. 

 - B, - -31.- 1-855. - "-I- 



- 5 13-82 6 



A - 20 18-11 



