Astronomical and Nautical Collections, 

 Mr, L(zx*s Method, 



285 



O's app. alt. 41 47 26 



Statement of the different openings of the booky the operations 

 performed^ the number of figures employed^ and the number of 

 pages in the Tables used, in working out the above example by 

 each method. 



In the second and third methods there is only one opening of 

 the book in taking out the numbers for the difference between the 

 apparent altitudes, and for the difference between the true alti- 

 tudes; and also for the apparent and true distances; and in 



