lio Ajkonomjy Manufa&ures, £?„•, 



ASTRONOMY. 



On the evening of Frimaire 16th, C. Eouvard, aftronomer 

 belonging to the Obfervatory at Paris, difcovereda comet in 

 the confiellation of Hercules. At half after fix next morn- 

 ing, its right afcenfion was 248!- degrees, and its northern 

 declination 31'. It had advanced 43 minutes per hour 

 towards the call, and 28 towards the fouth. It was fmall 

 and difficult to be feen. It forms the b'cjth, according to the 

 catalogue, in De Lalande's Allronomy. 



MANUFACTURES. 



Michael Szekely, overfecr of mines to Count Schonbom 

 at St. Nicholas, near Munkats in Hungary, has manufac- 

 tured a kind of cloth from the fwallow-wort [afclepias vtAce- 

 toxieum) interwoven with filk. A fpecimen of this new pro- 

 duction, confifting of 61 German ells, was prefented to the 

 magift rates of Ofven fcr infpeetion. The firft manufactur- 

 ing of it coft about 7 or 8 (hillings fterlino- but in future 

 the fame quantity will coft only 3 or 4 (hillings. It was 

 two ells in breadth, and of considerable finenefs. 



ARTIFICIAL COLD. 



Nearly at the fame time that Meffrs. Pepys and Allen 

 were engaged in the interefting experiments, of which we 

 have given an account in the preceding pages, Mr. Walker 

 of Oxford was alfo employed in producing frigorific mixtures. 

 For this purpofe, he ufed the fame materials in the follow- 

 ing proportions : 4 parts of the cryftallifed muriat of lime, 

 pulverifed, to 3 parts of uncompreffed dry fnow. On the 

 4th inftant, having, by means of a previous mixture, re- 

 duced his materials to 40 below o°, on mixing the cooled 

 ingredients, they gave a temperature of — 63° or 95 below 

 the freezing point of water. We believe the experiment 

 was only on a fmall fcale. We have not learnt what fub- 

 ftanccs, or whether any, were expoled by Mr. Walker to 

 the cold mixture. 



2, MINE- 



