3^ DESTROYING INSECTS, 



?nTsuome"t °/ *^'*t^»ng? and 12 O'clock noon, converted Into degrees of 



for determining the equator, and added to tlie right ascension of the sun if 



situaSof the *^® ^^^^ comes to themeredian after the sun, but substracted 



Jars, &c. from it if the star souths before the sun will give the right 



aseension of tbe star. With the right ascensions and de- 



cli|iation thus found enter a table of the right ascensions 



and declination of the principal fixed stars, and you will 



discover the name of the star which corresponds with these 



numbers. — The meridian attitudes of the heavenly bodies 



may always be found by counting the number of degrees 



between their declination and the index B. The astrometor 



maybe employed in the solution of various other problems; 



but the application of it io other purposes Is left to the in* 



genulty of the young astronomer. 



I am. Sir, 



Your obedient humble Servant, 



DAVID BREWSTER. 



Edinburgh^ April lAth^ 1807. 



11. 



Inquiry re- 

 specting the 

 means of de- 

 stroying fleas 

 and other in- 



Questions and Remarks concerning the best Methods of de^ 

 straying the Insects which infest Dwellings and Furniture^ 

 By a Correspondent. 



SIR, 



To Mr. NICHOLSON, 



JL LATELY read in a periodical work some enquiries by a 

 '* trifling Querist" respecting the best means of destroying 

 er expelling those troublesome insects bugs and fleas, but 

 particularly the latter. I was in great hope of seeing some 

 communication that might have been useful for this purpose, 

 but was much disappointed to read in a later number a 

 flippant sort of answer, that we might prevent their bite 

 hy covering our bodies with tar or pitch, and that their 

 bite might be cured by patience and letting it alone. The 

 same means, Sir, will cure the tooth ach.-^Somc persons 

 suffer very little ineonyenience from the bite of poisonous 



insects. 



