684 General Notes. [ November, 
studies in regard to the relations of plants to salt water, noting particu- 
larly the difference in habit between maritime plants and those of the 
‘interior. After this follow some unfinished geological speculations. 
BOTANICAL Drrecrory. — We call attention to the following notice 
by Mr. Leggett: “In view of the great utility to botanists of a full 
and correct directory, your aid is invited to render the new edition as 
complete as possible. It should include all botanical workers in Amer- 
.ica in every department; also libraries and herbaria valuable as refer- 
ences for their extent or special riches; also botanical societies and 
gardens. Specialties and a desire to exchange should be noted. It is 
hoped to issue the work about December 1st. The price will be for a 
single copy 40 cents; three copies for $1.00; a dozen for $3.00. Ad- 
dress Wm. H. Leggett, 54 East 81st Street, New York.” 
SCIENTIFIC German. — Under this title a work has been prepared 
by Mr. H. B. Hodges, instructor in chemistry and German in Harvard 
University. It is designed to aid students in acquiring a practical knowl- 
ge of the words, phrases, and general style of German writers upon 
scientific subjects. The portions of the work devoted to botany are 
very valuable. First are given lessons on histology, morphology, and 
physiology; after which follow selections from recent works by well- 
known authors. Of those most interesting to our botanical readers we 
will mention: Grisebach, On the Influence of Forests upon Climate; 
Liebig, On the Origin of Arable Soil, and Humus; Sachs, On Movements 
of Plants. The volume exhibits great painstaking, and excellent judg- 
ment throughout. The vocabulary is copious and accurate, and will 
prove of great use to readers of the recent German works on botany. 
CATALOGUE or Wisconsin PLants. — Th. A. Bruhin, of Centreville, 
Wis., communicates (date of April, 1876) to the Zodlogical and Botanic 
Society of Vienna a list of the plants of his State. The catalogue is pre- 
faced by three shorter lists: first, the names of plants supposed to be 
common originally to the flora of Europe and Wisconsin. Of the 239 
species, 122 are dicotyledons, 85 are monocotyledons, the remaining 32 
are vascular cryptogams. The second list comprises the plants carried 
from America to Europe and now growing wild there, and some of those 
more frequently cultivated, together 35 species. In the third list are the 
176 European plants introduced into Wisconsin. From these lists we 
learn that 450 species are common to Wisconsin and Europe. í 
Tue Size or THE Leaves or Austrias Woopy Prants.— In this 
memoir, Dr. Pokorny presents what he calls a phyllometric method, and 
which he believes is applicable to many leaves of shrubs and trees. He 
describes three transverse axes which cross the median line at right 
angles. The first of these is distant from the base of the leaf blade one 
fourth the length of the leaf; the second divides the leaf into halves the . 
third is midway between this line and the apex of the leaf. The ratios 
existing between these axes should give exactness to the terms applied — 
