AMERICAN CHEMICAL JOURNAL. 
This Journal contains original articles by American and roe chemists ; 
reviews of works relating to chemical science; reports on progress in the various 
- departments of Chem one! and items of picakal interest to Ces Published 
in numbers of from 64 to 80 pages; six numbers forming a volume of 
500 pages. Each volume a be completed, as nearly as is consistent sei the 
supply of uses within a year. Subscription price for the volume $3.00; 
ae ‘single ni umbers 50 cents. 
: Rees I, HU, Ill and IV, 1879-82, are now complete. Price $3.00 each. 
bscriptions and communications of all kinds should be addressed to IRA 
“sy Johns Hopkins University, Baltimore, Md. 
[Exe.] 
AMERICAN JOURNAL OF MATHEMATICS 
220. 2 PURE AND APPLIED. 
~ Published under the auspices of the Jouns Hopkins UNIVERSITY. 
In volumes of | about 384 quarto ages, “eageged four numbers issued quar- 
' Fifth vo pee ublished the prese 
prit s the publication me ad original ph nota oe Systematic . 
and briet expositions o of we yeesints thods will also be given. 
| SYLY te Bator in charge, WILLIAM B. 
£ Was rrosnlie A. A. NEWTON, 
