$G Experiments and Obfirvations 



fufficiently Angular, that M. Morand Ie ills had prefeiitee{ 4 

 fragment of a (lone, from the environs of Coutanecs, alfo 

 faid to have fallen from heaven, whieh only differed from 

 that of the abbe Bachelav beeaufe it did not exhale the he- 

 patic fmell with fpirit of fait. Yet the academicians did not 

 think any conclusion could be drawn from this refemblance, 

 unlefs that the lightning had fallen by preference on pyritical 

 nutter*. 



Monf. Barthold, profefieur a 1'ccole centrale du Ham- 

 Bhin, gave, I believe, the next, and laftf, analytieat account 

 of what he alio denominates picrrc de Ujnncrrc. He defcribes 

 it thus: — " The mafs of ftone known under the name of 

 fierre de iomurre d ' Enfijhchn, weighing about two quintals, 

 lias its exterior form rounded, almost oval, is rugged, and of 

 a dull earthy appearance. 



£ The ground of the ftone is of a blueifh gray colour in-* 

 terfperfed with infulated cryftals of pyrites, the cryftalhzation 

 of which is confufed, in fome places fcaly, accumulated, 

 forming nodes and fmall veins, whieh traverfe it in every 

 direction: the pyrites is of a golden colour : poliflmig gives 

 it the iplendour of fteel, and, when expofed to the atmolphere, 

 it becomes tarnithed and brown. One mav diftmguilh alfo 

 with the naked eye gray fcaly iron ore, not fulphureous, 

 fufceptible of being attracted by the magnet, little oxidated 3 

 or approaching much to the metallic Hate. 



" The fracture is irregular, granulated, of a grain fonte^ 

 what compact: in the inlide very fmall fitTnrcs are ktn It 

 does not ftrike tire with Heel '/its texture is fo loft, that it 

 readily fuflers itfelf to be attacked by a knife. J3y pounding, 

 it is eafily reduced to a blueilh gray powder of an earthy 

 odour. Sometimes there are found fmall cryltals of iron ore, 

 which prefent a greater refinance to the blows of the Hamper.'* 

 The fpeeifjc gravity of the piece in profetTorBarthold'spofr 

 feflion was 3233, diftilled water being taken at 1000. 



The analyhV of M. Barthold, of which I lliall alio have 

 occafion to ipeak hereafter^ gave iu the ico, 



Sulphur % 



Iron 20 



Magnefia 14 



Alumina - - 17 



Lime 2 



Silica 42 



* Sec 'Journal de Pby/ique, tom.ii, p. 251. 



+ A vtry imercfting detail of a meteor, and of ftones fallen in July 

 1790, was given by profeffcur Baudin in die Magazin for das Neuejte 

 <*us da Pi.^/ik, by profeffor Voigt. • • 



From 



