420 
matical Society contains: Reports of the 
eighteenth annual meeting of the society and 
of the fifth regular meeting of the South- 
western Section, by the secretaries; “Series 
of Laplace’s functions,” by B. H. Camp; “On 
a new mixed problem of the partial differential 
equation of telegraphy,” by A. G. Webster; 
““Non-Euclidean geometry” (review of Som- 
merville’s “ Bibliography of Non-Euclidean 
SCIENCE 
[N. 8. Vou. XXXV. No. 898 
Geometry”), by R. C. Archibald; “ Notes”; 
“New Publications.” 
Tue first number of a new architectural 
journal, entitled the Architectural Quarterly 
of Harvard University, will be published this 
month. The purpose of the periodical is to 
present in easily accessible form important 
work by students, special lectures delivered in 
the school, and contributions by members of 
THE DISTRIBUTIJN OF THE CHESTNUT BARK DISEASE 
