iOO :; ' Publications. 



employed, but with fome variation, the formula of De 1-t 

 Place in regard to the theory of Jupiter and Saturn. On 

 the Variation of the Obliquity of the Ecliptic, and of xW 

 Tropieal Year, by the fame. Obfervations made in the 

 Obfervatory of the Academic College at Mietau, from 1791 

 to 1795, by M. Beitler. Obfervations made In 1795 at his 

 *wn hov.fe, by M. Inochodzow. Obfervations on a Solar 

 Eclipfe, by M. Kumowfki. Extracts from Meteorological 

 Obfervations made in 1768 and 1769, at Jakutfk, by J. Ifle- 

 nief. The greateft height of the barometer was 28 , c>7 

 Paris inches, the leaft 36-17. On the nth of December 

 1768, at 4 in the afternoon, the mercury of a De Lille's, 

 thermometer, the feale of which reached only to 228 3 below 

 boilino- water*, funk entirely into the bulb." About 8 o'clock 

 on the 1 2th, the obferver expofed to the open air another 

 thermometer, the divifions of which reached down to 

 245 ; and at 8 o'clock in the morning of the 15th, the 

 quickfilver Hood at 229 (6fr& Fahr. below <f). Having 

 moved the inftrument, the quickfilver fell fuddenly into the 

 bulb, and remained in it till 8 o'clock in the morning of the 

 19th ; but at noon it rofe to 199° (26-8 of Fahr. below o ). 

 Extracts from Meteorological Obfervations made at Peterf- 

 burgh in 1792. In the department of Phyfics we find 

 C. F. Wolffs Tenth DilTertation, fourth part, on the Muf- 

 cular Vittels of the Heart, illuftrated with engravings. 

 Method of purifying Corrupted Water, with new Experi- 

 ments, by Lowitz. A little fulphuric acid and common 

 fait, when the water is intended for the purpofes of cookery, 

 ilren<nhens the effeel of the charcoal powder. The fame 

 author gives an account of his having difcovered Strontian 

 earth in fulphat of barytes, in which, according to his 

 numerous experiments, it forms a fifth part, and is always 

 prefent. He explains the difference between it and cal- 



• The fcale of De Lifle's thermotnerer commences with the point of 



boiling water. The freezing print is 150° below boiling, Edit. 



careous- 



