SCIENCE 
A WEEKLY JOURNAL DEVOTED TO THE ADVANCEMENT OF SCIENCE, PUBLISHING THE 
OFFICIAL NOTICES AND PROCEEDINGS OF THE AMERICAN ASSOCIATION 
FOR THE ADVANCEMENT OF SCIENCE. 
{DITORIAL ComMMITTEE: S. NEwcomsB, Mathematics; R. S. WooDwaRpD, Mechanics; E. C. PICKERING, 
Astronomy; T. C. MENDENHALL, Physics ; R. H. THURSTON, Engineering ; IRA REMSEN, Chemistry ; 
JOSEPH LE CONTE, Geology ; W. M. DAvis,, Physiography ; HENRY F. OsBoRN, Paleontology ; 
W. K. Brooks, C. HART MERRIAM, Zoology ; S. H. ScUDDER, Entomology ; C. E. BESSEY, 
N. L. Brirron, Botany; C. S. Minot, Embryology, Histology; H. P. BowniTcH, 
Physiology; J. S. BILLINGS, 
Hygiene ; 
WiLLiAmM H. WELCH, Pathology ; 
J. MCKEEN CATTELL, Psychology ; J. W. POWELL, Anthropology. 
Fripay, May 3, 1901. 
CONTENTS : 
Henry Augustus Rowland : PROFESSOR J. H. AMES 681 
Immunity and Protective Inoculation : PROFESSOR 
HENRY WINSTON HARPER........0..0.c2eseeceeees 684 
An Electro-Chemical Laboratory in the University of 
Pennsylvania; PROFESSOR EDGAR F. SMITH... 697 
Legislative Recognition of Scientific Work............ 704 
Spring Meeting of the Council of the American As- 
sociation for the Advancement of Science............ 705 
Scientific Books :— 
Lunardoni and Leonardi’s Gli Insetti Nocivi: 
NATHAN BANKS. Lassar-Cohn’s Introduction 
to Modern Scientific Chemistry : DR. WILLIAM 
B. ScHOBER. Seller’s Qualitative Chemical An- 
alysis ; Congdon’s Laboratory Instructions in Gen- 
eral Chemistry: H. F. Meade’s Chemists’ Pocket 
Manual: J. E.G. Books Received............ 706 
Scientific Journals and Articles............0+-+-0+e0-+0e+ 709 
Societies and Academies :— 
New York Academy of Sciences, Section of Geology 
and Mineralogy: DR. THEODORE G. WHITE. 
The New York Section of the American Chemical 
Society: DR. DURAND WOODMAN. Biological 
Society of Washington: KF. A. Lucas. The Las 
Vegas Science Club: T. D A. C....... cece eeec eens 710 
Discussion and Correspondence :— 
Priority of Place and the Method of Types: O. F. 
Cook. The Proper Name of the Alpine Chough : 
VAST ONT dg TOD acson0 uo: Goopdooesunsasobeocabbe sce 712 
Botanical Notes -— 
The Study of Mosses ; Botanical Facilities afforded 
to Students by the New York Botanical Garden ; 
A Study of Wheat: PROFESSOR CHARLES BEs- 
SITA%5 vaqdssde09000. cgroodnonqdasoaocaDo.cb0NoDEDedace9aERH0000 714 
Scientific Notes and News............. wees 115 
University and Educational News .... acco ‘Z/ilg) 
MSS. intended for publication and books, ete., intended 
fir review should be sent to the responsible editor, Pro- 
fessor J. McKeen Cattell, Garrison-on-Hudson, N. Y. 
HENRY AUGUSTUS ROWLAND. 
In the death of Professor Rowland, at the 
age of fifty-three, in the fulness of his 
activity and powers, the world has lost one 
of its foremost men of genius; America, its 
greatest scientist ; Johns Hopkins Univer- 
sity, the teacher and investigator who has 
brought it most renown. 
Henry Augustus Rowland was born at 
Honesdale, Pennsylvania, Nov. 27, 1848 ; 
he entered the Rensselaer Polytechnic In- 
stitute, Troy, and received the degree of 
C.H. in 1870. After a brief experience in 
practical engineering on a railroad he ac- 
cepted the position of teacher of science in 
Wooster College, where he taught physics, 
zoology and geology for the year 1871-2. 
He was then called to the Rensselaer Insti- 
tute as instructor, and was soon promoted 
to assistant professor. He remained at 
Troy until he accepted a position at Johns 
Hopkins University in 1875. The atten- 
tion of President Gilman of Johns Hopkins 
University was directed to Rowland by 
Professor Michie of West Point; and the 
first meeting of the two took place at the 
Academy on the Hudson. Before assum- 
ing the duties of his new office, at the sug- 
gestion of President Gilman, he spent a 
year in HKurope purchasing apparatus for 
his laboratory, becoming acquainted with 
the prominent scientists of England and 
the Continent, and making a prolonged 
