SPECTRES OCCASIONED BY DISEASE. Jgl 



according to the relative proportions of filver and copper which 



compofe the alloy ;* and, as the fpecific gravity of gold made 



(iandard by filver Is, in the ingot cafl; under the above circum- 



ftances, 17,927, while that of gold made ftandard by copper Is 



only 17,157, fo, according to the relative proportions of thefe 



two metals, when united In the alloy, the fpecific gravity of the 



ftandard gold may vary between the two extremes of 17,927 



and 17,157, although the real quality or value of the ftandard 



gold remains unchanged; and indeed, when fome allowance is 



alfo made for fmall variations arifing from other caufes, the 



range of the different fpecific gravities of gold made ftandard 



by filver and copper, may be confidered as nearly extending 



from 18 to 17. 



There is much reafon to believe, that the fpecific gravity o( ^f^^^ afw^' ^ 



fine gold has been too highly eftimated; and hence a notion eftimated too 



has been too commonly received in this country, which has vl?v^' , 



injurioufly and unjuftly been believed on the continent, that tions injurious 



the ftandard gold of the prefent reign is Inferior to that of the ^° """^ '^°'"* 



reigns preceding It. But the real fad is precifely the reverfe. Our old coin no^ 



If a kw of the old coins have proved better than ftandard, they ^° ^ood « th« 



' 'J new. 



were much inferior in the aggregate. 



II. 



A Memoir on the Appearance of Spe6lres or Phantoms occafioned 

 bj/ Difeafe, ivith Ffychological Remarks. Read by Nicolai 

 io the Royal Society of Berlin, on tJie 28th of February, 1799. 



P 



HILOSOPHERS divide the human being Into body and On the phlloft- 



mind, becaufe the numerous and diftinaobfervations we make P^iical/I'vifions 

 ' refpecting body 



on ourfelves oblige ustoconfider man particularly, as well In and mind. 



refpedl to his corporeal as his mental fun6tions. Other phdolb- 



phers have fuppofed that this fubjedt might be treated with 



greater perfpicuity by confidering man as compofed of body, 



foul, and mind. There can be no doubt but that thefe, and 



even more divifions might be invented. Such philofophers, 



* Thefirft guineas which were coined, or thofe of Charles II; 

 and James II. were generally alloyed with ftandard filver; but the 

 coins of the fubfequent reigns have been alloyed with copper, added 

 to compenfate the deficiency of alloy, or of filver in the gold. 



Vol. VI.— November, 1803. iVI how- 



