420 NOTES ON THE GEOLOGY 



in Northern Europe, or New England, no one would have 

 doubted at all that it was a genuine example of the dispersion of 

 bowlders during the period of the deposition of drift. Some 

 might, indeed, suppose that these bowlders and gravel were carried 

 southerly by the waters of the Mediterranean, when their whole 

 track was beneath the waves. But such a dispersion could not 

 have taken place without ice ; and to introduce this, carries us 

 back to the drift period, which is admitting all that I contend for. 

 Beyroot lies in north latitude, thirty-four degrees, and this is cer- 

 tainly further south than any glacio-aqucous agency has been 

 hitherto detected. 



But I must close ; and I cannot do it in a better manner, than 

 by quoting a few remarks from a private letter from Mr. Perkins, 

 in 1839, on the importance of a knowledge of geology to the 

 missionary. " Did not my missionary work," says he, " press 

 upon me so constantly, and with such mountain weight, I should 

 feel strongly tempted to study geology, (of which I know very 

 little,) so wonderfully interesting, in a geological point of view, 

 does the face of Persia appear to me. Indeed, I often feel that 

 this interesting and important science has peculiar claims on 

 American missionaries. Visiting, as they do, all portions of the 

 world, they enjoy opportunities of contributing to it, with almost 

 no sacrifice of time or effort, which are possessed by no other class 

 of American citizens. I know not that I can better atone for my 

 own deficiency in this respect, than by requesting you, in my 

 behalf, to urge upon the missionary students in college, the high 

 importance of their obtaining a good practical knowledge of ge- 

 ology and mineralogy, while attending your lectures, as they 

 would enhance their usefulness in future life. It is the combined 

 light of All Truth, scientific as well as i-eIig-ioiis, which is to 

 render so perfect and glorious tlie splendors of millennial day." 



ArPENDix. — A part of my collection of specimens from Asia, 

 consists, as already intimated, of rocks and minerals, sent from 

 Ahmedniiggur, in India, more than one hundred miles east of Bom- 

 bay, by Rev. E. Burgess. They were obtained in the vicinity of 

 that place ; and show that trap rocks make up most of its geology. 



