HOW TO OBSERVE THE HEAVENS. 



the one will correspond in its position with its representative mark 

 or symbol on the other. If we imagine a line drawn from the 

 centre of the globe through the mark upon its surface indicating 

 any star, such a line, if continued outside the surface toward the 

 heavens, would be directed to the star itself. 



For example, suppose that when the mark of the sun is brought 

 under the meridian, the hour 5h. 40m. is found to be on the 

 equator at the meridian, and it is required to find the aspect of the 

 heavens at half-past ten o'clock in the evening. 



H. M. 



To 5 40 



Add 10 30 



16 10 



Let the globe be turned until 16h. 10m. is brought under the 

 meridian, and the aspect given by it will be that of the heavens. 



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