Vlii CONTENTS. 



Page* 



32. Minerals not yet described in the common systems of min- 



eralogy, --.--.-_ 391 



33, 34, 35. Notice of an irised Aurora Borealis — Reliquiae Dilu- 



viana3 — Antediluvian human remains, - - - 393 

 36 37. Heidelberg collections of geological specimens — Cements 



for iron water pipes, ______ 394 



38, 39. Potatoe cheese — On the supposed influence of magnet- 

 ism in the phenomena of chemical combinations and crys- 

 tallizations, -------- 395 



40. Animal putrefaction, ------- 397 



41. On the dark precipitate of platina of Ed. Davy, and on the 



property of spongy platina, ----- 393 



42. 43. Reduction of nitrate of silver — Flesh of young calves, 400 

 44, 45. Cloth of amianthus — Charlatanism, _ - _ 40I 

 46, 47. Chemico-magnetism — Analysis of pollen, - - 402 



48. On metallic decompositions by phosphuretted hydrogen gas, 403 



49, 50. On the treatment of siliceous minerals by carburetted al- 



kalies — Change of color in the wood of certain trees, 404 



ERRATA.— Vol. XVIII. 



Page 138, line 13 from top, for Gienofleiche read Geinsfldche. 

 " " " 17 " " for blocks read blacks. 

 " « « \2irova.'boitom,fov present Tez.& presented. 

 " 145, " 11 from top, for a fish, read the fist. 

 " 147, Art. 8 is substantially repeated on page 156. 



Correction. 



Page 64, line 12 from top, after and, read except being below. 

 " " " 3 from bottom, for dividing, read multiplying, and after by, read 

 100 and dividing by. 



Rev. Sayrs Gazlay, of Salem Bridge, Waterbury, Conn, is the author of the 

 article on the bones at Big Bone Lick, Kentucky. 



