Mr DUNLOP'S Account of Observations made in Scotland 



OBSERVATIONS WITH THE NEEDLES IN CHRISTIANIA, 



MADE BY 



Professor HANSTEEN, for the purpose of comparing them with his Standard Cylinder by 

 DOLLOND, previous to their being sent to Edinburgh. 



The Observations were made in Professor HANSTEEN'S Garden. 



FLAT NEEDLE. First Arc 20. 



CYLINDER, No. 1. First Arc 20. 



