386 Miscellanies. 



lowed by a thunder-gust, the observations show singular and rapid 

 changes of the variation. These results agree, the author remarks, 

 with a single deduction made by Mr. Christie from observations 

 of his own, but which had not been followed up, and was contradic- 

 ted by the results obtained at Port Bowen, by the late Lieut. Fos- 

 ter ; a contradiction which he endeavors to explain. 



9. Notice of the late Eclipse. 



Baltimore, 3d December, 1834. 

 To Profess OR Silliman. — Sir. — Being desirous of recording 

 my observations of the late Solar Eclipse, and as a subscriber to 

 your valuable Journal, I beg leave to communicate the following. 



The place of observation in Baltimore, is about one mile from 

 the monument square or center of the city. The latitude of the 

 former by close observations, is 39° 17' 12'' N. 



The time , was observed minutely On a chronometer by Parkinson 

 and Frodsham, whose rate has been for some time back, at 0.5". 

 slow. 



The local Mean time was ascertained by sets of altitudes of the 

 Sun, accurately taken on the forenoons immediately preceding and 

 succeeding the eclipse. 



The contacts were observed by two persons, with a Dollond 

 Achromatic Telescope of eighty five power, assisted by a smaller 

 one of about, thirty, the two observations agreed so nearly, as not to 

 admit of any distinction. 



Beginning 12h. 51' 58", Meantime at Baltimore. 

 End 3h. 31 29 30'". 



Temperature by Fahrenheit's Scale. 

 Exposed to the Sun. Exposed to the north, 



at 12 noon QQ° 50° 



1 P. M. QQ"" 51° 



2 " 55° 49° 



3 " 62° 50° 



Very respectfully, your most ob't serv't. 



Lewis Brant. 



10. To the Entomologists of -^wienca. — Having at length suffi- 

 ciently arranged the large entomological collections made during my 

 researches in Tropical America, by which the duplicates are separated 

 from the series placed in my own cabinets ; I am now prepared to 



