980 



iSCIENCK 



[N. S. Vol. XI. No. 286. 



corona show from three to four solar di- 

 ameters extension for the longest streamers. 

 The equatorial ' wings ' as they recede from 

 the sun, are finally lost in an illuminated 

 sky, without any indication of having 

 actually come to an end. 



Ko attempt to carefully examine the 

 plates taken for intra-mercurial planets has 

 yet been possible. It is, however, as has 

 been remarked, doubtful if very faint 

 objects will be found, in consideration of 

 the considerable sky illumination during 

 totality. However, Pleione in the Pleiades, 

 (a star of the 6.3 magnitude) is plainly 

 seen on one of the plates and some smaller 

 ones are discernible. 



On the whole, the expedition may be con- 

 sidered as promising to be very satisfactory 



to one and all of whom I desire to express 



my obligations. o -r, ^ 



•^ ® S. P. Langley. 



Smithsonian Institution, 



Washington, D. C, June 9, 1900. 



SCIENTIFIC BOOKS. 

 Text-Book of Paleontology. By Kael A. voN 

 ZiTTEL. Translated and edited by Chaeles 

 R. Eastman. English edition, revised and 

 enlarged by the Author and Editor, in col- 

 laboration with C. E. Beechee, J. M. 

 Claekb, W. H. Dall, G. J. HiNDE, A. 

 Hyatt, J. S. Kingsley, H. A. Pilsbey, C. 



SCHUCHEET, S. H. SCUDDEE, W. P. SLADEN, 



E. O. Uleich, C. Wachsmxjth. London and 

 New York, Macmillan & Co. 1900. Vol. 

 I. 8vo. Pp. X + 706. 1476 woodcuts. 

 This volume is the result of an interesting 

 experiment. To take an epitome of a science, 



Fig. 4. Dark room and tubes o£ 135 foot ami 33-foot telescopes. 

 Langley observing. 



Siuch equatorial in foreground, Professor 



in its results, and that it was so, is largely 

 owing not only to the efiScient care of Mr. 

 Abbot, but to the many gentlemen who 

 have assisted me with the loan of valuable 

 apparatus, with counsel, with voluntary 

 service, and with painstaking observation. 



impressed with the individuality of an eminent 

 investigator, who is if anything even more emi- 

 nent as a teacher, a clear synopsis drawn up on 

 an harmonious plan, distinguished by both 

 breadth of outlook and a restraining common 

 sense, and then to entrust the several chapters 

 of this work to men who are essentially special- 



