324 Tlte J'kirlh as seen from the Mann. 



brought nearer day by day to that great scientific consummation, 

 a theory of terrestial magnetism, but the practical importance 

 of knowing accurately the behaviour of the needle at the 

 different parts of our globe is patent to every one. 



The Kew committee have likewise lately introduced an 

 arrangement by means of which sextants, quadrants, and 

 other geographical instruments may be verified, but we for- 

 bear to enter farther into this interesting subject at present. 



While we have thus imperfectly described the chief pro- 

 cesses at Kew we have not even yet exhausted the work of 

 the observatory. As it is an institution for the determina- 

 tion of various points in physical science, new problems of 

 importance are taken up as they present themselves. We 

 have elsewhere noted the fact that Mr. Gassiot's magnificent 

 spectroscope is at Kew, and we shall now conclude by ex- 

 pressing our belief that it will not be allowed to remain idle 

 during the fine summer weather which we hope is near. 



THE EAETH AS SEEN FROM THE MOON. 



M. Camille FlAMMAElON gives the following account of the 

 ice the earth must present to the in 1 of the 



moon : — 



"The inhabitants el' the moon perceive in their sky a 



bic r, constantly immoveable &i the same height. To 



lobe is twelve times as large as the sun, hut it 



rom all tin- shirs in being ;il\v;iys suspended in 



sami ir heads, it presents phases to them us 



the moon di as, passing through ;;!1 the gradations of 



new and Full earth. This star, us we have jusl said, is the 

 c arl li i hal we inhi 



" Those who dwell in the centre of the lunar disc behold 

 our glol pended from their zenith hovering eternally in 



the arry skies. * Ithers see it at 70 de 



t > < m , others at 45 degrees, us they inhabit Bpots 1 'e or 



m< ed from the centre of the visible hemisphere. Those 

 who live near the borders of this hemisphere see our globe 

 i □ t heir horizon .A little further on 



only half the eai fch i oible, and in ; bo another 



hes for ever. 

 " 1 1' mination of longitudes, the i 



ore beautiful and more useful to the moon than the moon 

 i the earth, and if the Selenites* rolling beneath a 

 pret the law of final i with us much partiality us we do, 



* Selenites, from aelcno (ScA^vrj), Uic moon, inhabitants of that orb. 



