The Moon. 461 



Jamaica,, and so rapid is their extension that, in all human proba- 

 bility, there will be a supply of Peruvian bark from these sources 

 at the very time South American forests are approaching ex- 

 haustion. Other countries with climates suitable might try the 

 cultivation, which, in order to be of real benefit to mankind, ought 

 to be as general as that of the spices, and conducted by private 

 enterprise. The first plantations in Java were made in the open 

 clearings, but afterwards this system was given up, and avenues 

 were cut through the virgin forest, in which the Chinchonas 

 were set, thus going to the other extreme, and allowing them 

 no sun whatever. The latter is the system still pursued in 

 Java, whilst the former, with some modification, has been 

 adopted on some of the most important plantations in India, 

 and is expected to lead to more speedy and profitable results. 



THE MOON. 



BY THE EEV. T. W. WEBB, E.E.A.S. 



The student who feels disposed to carry into effect the sugges- 

 tions contained in a previous paper, will have to bear in mind 

 that, notwithstanding the peculiar accessibility of our satellite 

 in point of distance, its frequent visibility, and the powerful 

 grasp upon it possessed even by moderate sized instruments, 

 certain conditions are requisite for the accurate comprehension 

 and delineation of its minute details ; and not even keenness of 

 sight, or accuracy of pencil, can adequately compensate for 

 entire ignorance of perspective, or of the laws of light and 

 shade. The surface which we have to interpret and represent 

 may probably be composed of materials not dissimilar to those 

 of our globe, and their arrangement is not so wholly different 

 as might be supposed in the judgment of an uninstructed eye ; 

 but they are exhibited to us in a way so very unlike any views 

 that we ever obtain of the surface on which we stand, that it 

 requires some attention to discover their real configuration. 

 We look upon a hemisphere which presents its details to us 

 under every possible angle between 3 and 90° ; and the partial 

 or total concealment of one object behind another, and the 

 effect technically called " foreshortening," by which length is 

 contrasted when viewed end ways, and height diminished when 

 regarded from above, and circles are transformed into ellipses, and 

 right angles become obtuse or acute, ought to be understood and 

 allowed for. A general idea also of what is termed u relief," is 

 equally as important as one of perspective. The laws of light and 



