PLATE XVJL. 



.Royal TJiyszcal Society J?clznbicrqh> 



J.Miipvuni2--pii>z£ 





6. C2^feie#<de??7z<z/ frA-c^t/. 



& 



7. C^t^y/n^Li ^KLrfetonawvnt/. Wesiw. 



10. 



8. ^aMaHzet^ a/ic?ckH^. Sopc. 



11 



lebrujL .yadp* 





/ fcr/i/?<rr/s(CC>t<C<04 . 



