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SCIENCE. 



[N. S. Vol. V. No. 125. 



not available at this time to review them, 

 but they cannot fail to be of great signifi- 

 cance to all thoughtful students of the 

 problems before us to-day. 



Previously to the delivery of the lectures 

 invitations had been sent by the Johns 

 Hopkins University to geologists through- 

 out the country, asking them to be present 

 and to share in the excursions that were in- 

 cident to the occasion. In response, the 

 fifty or more whose names appear below ac- 

 cepted. WhUe the lectures were being de- 

 livered short excursions were conducted 

 almost daily to places of geological interest 

 near Baltimore, on one of which Sir Archi- 

 bald and his companions were the guests of 

 the Secretary of the Navy at the Waval 

 Academy, Annapolis, and upon one of the 

 United States government vessels on a trip 

 to view the Cretaceous and Tertiary forma- 

 tions along the Severn Eiver. 



A longer excursion was made at the close 

 of the lecture so as to illustrate the geology 

 of the State of Maryland from the later 

 formations of the Coastal Plain, across the 

 Archean axis of the Blue Kidge, and the 

 Paleozoics as far as the upper Coal Meas- 

 ures in the St. George's field. Through the 

 vigorous and untiring efforts of Professor 

 W. B. Clark, who is also State Geologist of 

 Maryland, the interest of the Governor of 

 the State and of the principal railway and 

 mining officials had been secured, so that 

 free transportation was given on the Balti- 

 more and Ohio, the Cumberland and Po- 

 tomac,and the Western Maryland Railways, 

 as well as on one of the State official steam- 

 boats. On Wednesday, April 28th, the 

 State vessel ' Governor McLane ' carried a 

 party of forty down Chesapeake Bay to 

 view the Cretaceous and Tertiary strata in 

 the bluffs along the shore. That evening 

 two sleepers were boarded and reinforced 

 by about ten additional guests from Wash- 

 ington; the party was taken to Cumberland, 

 Md., from which starting point the mem- 



bers visited the St. George's coal field, as 

 guests of President Lord, of the Consolida- 

 tion Coal Company. Thursday evening Gov- 

 ernor Lowndes, of Maryland, entertained 

 the party at a reception in Cumberland. 

 Friday was passed among the Cambrian, 

 Silurian, Devonian and Triassic exposures 

 along the Potomac River, and Saturday the 

 President of the Western Maryland Rail- 

 road guided the visitors over the Blue 

 Ridge mountains, where the Cambrian 

 quartzite and pre-Cambrian volcanics are 

 so well exposed. The trips closed with a 

 visit to the battle-field at Gettysburg. It 

 has left a lively feeling of appreciation in 

 the minds of all the participants toward 

 their generous entertainers, and especially 

 toward Professor Clark and his associates 

 at Johns Hopkins, whose efforts both be- 

 fore and during the trip were unstintedly 

 given. The following list of participants 

 in the excursions will indicate the very 

 general desire on the part of American 

 geologists to do honor to the distinguished 

 guest : 



F. D. Adams, McGill College, Montreal ; 

 Cleveland Abbe, Jr., of Washington ; R. M. 

 Bagg, Johns Hopkins University ; W. S. 

 Bayley, Colby University ; F. Bascom, 

 Bryn Mawr College; George F. Becker, 

 U. S. Geological Survey ; L. A. Bauer, 

 University of Cincinnati ; J. M. Clarke, 

 Assistant State Geologist of ISTew York ; 

 Samuel Calvin, State Geologist of Iowa ; 

 W. B. Clark, State Geologist of Maryland ; 

 N. H. Darton, U. S. Geological Survey; 

 J. S. Diller, U. S. Geological Survey ; C. W. 

 Dorsey, U. S. Department of Agriculture ; 

 S. F. Emmons, U. S. Geological Survey ; 

 O. L. Fassig, U. S. Weather Bureau ; Sir 

 Archibald Geikie; D. C. Oilman, Johns 

 Hopkins University: L. C. Glenn, North 

 Carolina; R. T. Hill, U. S. Geological Sur- 

 vey ; A. B. Hoen, of Baltimore ; J. A. 

 Holmes, State Geologist of North Carolina ; 

 C. W. Hayes, U. S. Geological Survey; J. 



