JANUARY 25, 1901.] 
100° for the two points was Celsius, but in his 
instrument 0° represented the boiling point of 
water. Finally the change to the modern 
centigrade scale was made independently by 
Christin of Lyons and Strémer of Upsala, in 
1748. With this date, Dr. Bolton’s story of 
the evolution of the thermometer ends. 
At the close of the book is given a table of 
the relative values of thirty-five different scales 
which have been used at various times; a 
chronological epitome; a list of authorities, 
and an index to the book. 
Ao 1, Jel 
BOOKS RECEIVED. 
A Treatise on Elementary Dynamics. H. A. ROBERTS. 
New York and London, The Macmillan Company. 
1900. Pp. xi+258. $1.10. 
An Introduction to Modern Scientific Chemistry. LAs- 
SAR-COHN. Translated byM.M. Partison Murr. 
New York, D. Van Nostrand Company. 1901. 
Pp. viii 348. $2.00. 
The Foundations of Botany. 
- Boston, Ginn & Company. 1901. 
v + 257. 
JOSEPH Y. BERGEN. 
Pp. x+ 412); 
SCIENTIFIC JOURNALS AND ARTICLES. 
In the November—December number of the 
Journal of Geology James Perrin Smith discusses 
the ‘Principles of Paleontologic Correlation.’ 
He lays great stress on interregional zones and 
concludes that correlations upon homotaxis 
and synchronism should not be very different. 
Under ‘Contributions from Walker Museum’ 
H. C. Case describes ‘The Vertebrates from the 
Permian Bone Bed of Vermillion County, IIli- 
nois.’ A forty-page article by C. R. Van Hise 
on ‘Some Principles controlling the Deposition 
of Ores’ discusses the concentration of ores by 
underground water. He urges a new and nat- 
ural classification of these ore deposits based 
upon their genesis, believing that such a divi- 
sion would also be of the greatest importance 
in the practical problems of engineers. 
THE contents of the Journal of the Boston So- 
ciety of the Medical Sciences for December 4, 
1900, are as follows: ‘Demonstration of a 
Photomicrograph of the Bacillus of Soft Chan- 
cre,’ by F. B. Mallory; ‘The Etiology of the 
Chancroid,’ by Abner Post; ‘A Simple Method 
of cultivating Anaérobic Bacteria,’ by James H. 
SCIENCE. 
147 
Wright; ‘Occurrence of the Typhoid Bacillus 
in Suppurative Processes and in the Feetus,’ 
by Oscar Richardson, being the annotated rec- 
ord of a number of cases, and ‘ Observations on 
Milk Coagulation and Digestion,’ by Franklin 
W. White. 
The Plant World for December, 1900, opens 
with a popular article on ‘Irises,’ by F. H. 
Knowlton, in which he notes that there are 
about 160 species, and W. J. Beal presents, 
with illustrations, ‘A Few Observations on 
Root Hairs’; Arthur Hollick gives ‘An Ex- 
ample of Deductive Reasoning,’ this being that 
the bottom deposits in a small swamp on Staten 
Island should represent the Quaternary age, a 
deduction that was verified by the excavation 
of the swamp. Edward Hale Brush gives some 
notes on ‘ Horticulture and Landscape Garden- 
ing at the [coming] Pan-American HExposi- 
tion.’ 
The Auk for January contains two biograph- 
ical sketches, ‘In Memoriam: Elliott Coues,’ 
by D. G. Eliot, and ‘In Memoriam: George 
Burritt Sennett,’ by J. A. Allen, both accom- 
panied by portraits. Outram Bangs gives some 
observations on ‘Birds of San Miguel Island, 
Panama,’ incidentally describing four new spe- 
cies. James H. Fleming presents ‘A List of 
the Birds of the Districts of Parry Sound and 
Muskoka, Ontario,’ comprising 196 species, and 
E. W. Nelson gives ‘Descriptions of Five 
New Birds from Mexico.’ ‘The Sequence of 
Moults and Plumages of the Laride’ (Gulls and 
Terns) is discussed by Jonathan Dwight, Jr., a 
subject that has received little attention, save 
at the hands of Brehm, in 1854. John H. Sage, 
the secretary, has an abstract of the ‘ High- 
teenth Congress of the American Ornithologists’ 
Union.’ ‘The ‘Report of the Committee on the 
Protection of North American Birds for the 
Year 1900,’ by Witmer Stone, shows that while 
much has been accomplished, a great deal 
remains to be done, and that decided help may 
be hoped for from the recent “Lacey Bill.’ 
William Dutcher gives the ‘ Results of Special 
Protection to Gullsand Terns obtained Through 
the Thayer Fund,’ the expenditure of $1,400 
haying resulted in the preservation of many 
birds. 
