Lhe American Naturalist 
Will enable any one to keep abreast of the latest scientific intelligence in 
every department of natural science. Besides its longer articles it publishes 
eleven different departments of scientific intelligence, each one under the charge 
of an editor of the highest scientific standing. 
It will insert small advertisements of a non-commercial character free for 
its subscribers. For commercial advertisements intended to reach the eyes of 
scientific men its regular advertising pages will be found the best possible 
medium. 
Abstracts of original work published while investigations are in progress for 
the purpose of securing date of publication are especially adapted to its. pages, 
and are gladly published. The audience thus secured is the very best. 
We think you will find it worth your while to make its acquaintance. To 
enable you to do this cheaply we will send a sample (back) number on 
receipt of 10 cents in stamps or coin (regular price 40 cents). 
FERRIS BROS., Publishers, 
‘S. W. Cor. Sixth and Arch Streets, PHILADELPHIA. 
PRINGLE’S PLANTA MEXICANA, 1890. 
(SIXTH ANNUAL DISTRIBUTION). 
Sets of some 300 species collected chiefly in the less explored portions of the 
States of San Luis Potosi, Michoacan and Mexico. Also, many species of 
Mexican Ferns in beautiful specimens offered separately from the sets. 
Price list supplied. 
C. E. PRINGLE, East Charlotte, Vermont. 
THE. OBSER Yk. 
A medium of interchange of observations for all students and lovers of nature. 
Devoted to all departments of nature studies. 
Published Monthly at Portland, Conn. 
E. F. BIGELOW, Editor and Publisher, 
ASSOOIATE EDITORS: 
M. A. BOOTH, F.R.M.S., Microscopy, A. W. PEARSON, Entomology, 
Longmeadow, Mass. Norwich, Conn. 
C. ANTOINETTE SHEPARD, Botany, 
New Britain, Conn. 
SEND FOR SAMPLE COPY. 
