SCIENCE 
EDITORIAL COMMITTEE: S. NEwcoms, Mathematics; R. 8S. WoopwARD, Mechanics; E. C. PICKERING 
Astronomy; T. C. MENDENHALL, Physics; R. H. THuRSTON, Engineering 
; IRA REMSEN, Chemistry; 
J. LE Conte, Geology; W. M. Davis, Physiography; O. C. MARsH, Paleontology; W. K. Brooks, 
C. Hart MERRIAM, Zoology; 8. H. ScupDER, Entomology; C. E. Brssry, N. L. Brirron, 
Botany; HENRY F. OsBoRN, General Biology; C. S. Minor, Embryology, Histology; 
H. P. Bowpitcu, Physiology; J. S. BILLines, Hygiene; J. MCKEEN CATTELL, 
Psychology; DANIEL G. BRINTON, J. W. POWELL, Anthropology. 
FRIDAY, OcToBER 29, 1897. 
CONTENTS: 
Special Explorations in the Implement-bearing Deposits 
on the Lalor Farm, Trenton, N. J.: G. FRED- 
TOTRUIOLS Wy TBICHS Oh > ccoocconpa0q00cecosq:oneHoncongDes9qo5060 637 
Professor Rudolph Heidenhain: LAFAYETTE B. 
IJTTSSIDISE coccennooceeoasonga20 sesonoss0eucosencqqqccosennS 645 
Physics at the Detroit Meeting of the American Asso- 
ciation for the Advancement of Science: GEORGE 
Vo IPATERISTASONT, dJ18scsococooqsonssosonpoossesanncosense6 649 
A New Method of Synchronizing Strata: CHARLES 
18, JECONAaS coqucoqsocosaoqaaoos coo cos HesobonnosaceandascogdGd 655 
Current Notes on Phystography :— 
The Rocky Mountain Front; Castle Mountain, 
Montana; Scenery of Yellowstone Park; The 
Phlegrean Fields: W. M. DAVIS.............000++ 656 
Current Notes on Anthropology :— 
The Present Position of Ethnography ; The End of 
the Human Race: D. G. BRINTON.........s.000000 657 
Notes on Inorganic Chemistry: J. L. H............-+ 658 
Scientific Notes and News......... Saouesidecssitlorshaaee seats, 659 
University and Educational News.... 
Discussion and Correspondence :— 
Lewis on the Diamond: GEORGE F. BECKER. 
Note on the Easternmost Volcanoes of the United 
States: JULES MarRcou. Glacial Strie: AL- 
BERT G. RAv. The Alleged Extinction of Lines 
of Descent: J. MCKEEN CATTELL................-- 664 
Scientific Literature :— 
Recent Books on Physics: M. Comstock’s Insect 
Uf Er Sm Wie Wickens son clsen croc dn ccctteae-eccescesleseces 669 
Societies and Academies :— 
The Biological Society of Washington: F. A. Lu- 
cAs. The New York Academy of Sciences—Sec- 
tion of Geology: RicHARD E. DopeE. The 
New York Chemical Society: DURAND Woop- 
MAN. Academy of Science of St. Louis: WuIL- 
MAM e DRE TW AGH ceastocsce seme tereeteeceasrte esse scessre: 671 
New Books. 
MSS. intended for publication and books, etc., intended 
for review should be sent to the responsible editor, Prof. J. 
McKeen Cattell, Garrison-on-Hudson, N. Y. 
SPECIAL EXPLORATIONS IN THE IMPLE- 
MENT-BEARING DEPOSITS ON THE 
LALOR FARM, TRENTON, WN. J.* 
By permission of Professor F. W. Putnam 
a number of geologists and archeologists 
wereinvited by me to conduct independent 
investigations on the Lalor farm in Tren- 
ton, N. J., with a view to verifying the con- 
clusions at which he had arrived concerning 
the age of the artifacts found in the gravel 
at that place. Asa result of the invitation, 
Mr. H. C. Mercer, Professor Arthur Hol- 
lick, Dr. H. D. Kimmel and Professor Wil- 
liam Libbey met with me upon the ground, 
and we availed ourselves of the facilities 
afforded us by Mr. Ernest Volk, who has 
been for several years engaged in explora- 
tions in the vicinity of Trenton, under the 
direction of Professor Putnam, in the in- 
terests of the Peabody Museum, Cambridge, 
Mass.; the Columbian Exposition, of Chi- 
cago, and the Museum of Natural History 
of New York City. I was upon the ground 
the 25th, the 26th and the 28th of June, 
and September 13th and 14th, 1897. Atthis 
time Mr. Mercer was present every day but 
the 13th of September, and Professor Hol- 
lick every day but the 28th of June and 
the 14th of September, while Dr. Kimmel 
and Professor Libbey were present for only 
a single day. 
* This paper will be followed by others on the same 
subject.—ED. 
