May 24, 1901.] 
been only a short time before elevated to 
the dignity of Patriarch of Jerusalem, be- 
came on the 29th of August, 1261, Pope Ur- 
ban LY., the known friend of Campanus. 
He would naturally receive one of the first 
copies. Indeed, there is evidence that it 
was hastily given to him ; for the geometri- 
cal figures are not drawn all the way through 
the MS., notwithstanding its being an excep- 
tionally handsome MS., for such a work. 
It seems, then, that the book must have 
been published, say, within a year of Au- 
gust, 1260. 
Tf this inference be admitted, we have in 
the commentary of Campanus, considering 
its respectable strength, occasionally its re- 
markable strength, additional evidence of 
the promising beginning of science which 
was made in the thirteenth century until 
all that sort of thing was swept away before 
the flood of scholasticism ; while in its lapses 
into utter absurdity, though they are but 
rare, we meet with another characteristic 
which is marked in Petrus Peregrinus, in 
Roger Bacon, and in other scientific stu- 
dents of that period. 
C. S. PEIRCE. 
P.§S. I notice that Moritz Cantor (II., 
100) will have it that Urban reigned until 
1281. Considering what a difference it 
would have made for the history of Sicily, 
for our friend Roger Bacon, and for some 
famous works of literature, if he had, the 
slip is, perhaps, worth notice. 
When I can have the privilege of exam- 
ining the MS. again and of consulting a 
library, I think I can strengthen my proof 
of the date of the work. 
THE AMERICAN ASSOCIATION FOR THE 
ADVANCEMENT OF SCIENCE. 
Tue following is the list of those who 
have been elected members of the American 
Association for the Advancement of Science 
and have completed their membership from 
January 1 to April 30, 1901. The list 
SCIENCE. 
811 
includes the names of twenty-six former 
members and fellows, who have since Jan- 
uary lst been restored to the list by pay- 
ment of arrearages for more than two years. 
Adams, C. C., University of Chicago, Chicago, Ill. 
Adams, Frederick C., Teacher of Science, Classical 
High School, Providence, R. I. 
Alderson, Victor C., Dean of the Technical College, 
Armour Institute of Technology, Chicago, Il. 
Alexander, Chas. Anderson, M.E., 10 Vine St., Bata- 
via, N. Y. 
Alleman, Gellart, Ph.D., Instructor in Chemistry, 
Washington University, St. Louis, Mo. 
Alpers, Wm. C., 45 West 31st St., New York City. 
Ames, Oakes, Assistant Director of the Botanic Gar- 
den of Harvard University, North Easton, Mass. 
Appleton, John Howard, Professor of Chemistry, 
Brown University, Providence, R. I. 
Ashmead, Wm. H., Department of Insects, U. 8S. 
National Museum, Washington, D. C. 
Baekeland, Leo, M.D., ‘Snug Rock,’ North Broad- 
way, Yonkers, N. Y. 
Baerecke, John F., Ph.D., M.D., Professor of Biology, 
Stetson University, DeLand, Fla. 
Bagby, J. H. C., Dept. Physical Science, Hampden- 
Sidney College, Hampden-Sidney, Va. 
Baker, James H., President of the University of 
Colorado, Boulder, Colo. 
Ball, Elmer Darwin, Assistant Professor of Zoology, 
Agricultural College, Fort Collins, Colo. 4 
Ball, Miss Helen Augusta, 43 Laurel St., Worcester, 
Mass. 
Bancroft, Frank Watts, Ph.D., Instructor in Physi- 
ology, University of California, Berkeley, Cal. 
Bancroft, Wilder Dwight, Instructor in Chemistry, 
- Cornell University, Ithaca, N. Y. 
Bardeen, Charles Russell, Anatomical Laboratory, 
Wolfe and Monument Sts., Baltimore, Md. 
Barr, Charles Elisha, Professor of Biology, Albion 
College, Albion, Mich. 
Bauder, Arthur Russell, Instructor in Physics, Board- 
man High School, New Haven, Conn. 
Beach, Miss Alice M., 932 W. Illinois St., Urbana, 
Tl. 
Beach, Charles Coffing, M.D, 54 Woodland St., 
Hartford, Conn. 
Beede, Joshua William, Atchison County High 
School, Effingham, Kans. 
Beers, M. H., 410 Broadway, New York City. 
Bentley, Wray Annin, Instructor in Metallurgy, 
Columbia University, New York City. 
Bergstrém, John Andrew, Ph.D., Associate Professor 
of Psychology and Pedagogy, Indiana University, 
Bloomington, Ind. 
