138 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 1. NO. 3. 
intolerant, and that the succession of trees depended upon their 
relationship in this respect. The opinion so current among lum- 
bermen that the white pine will not succeed itself was shown 
to be a fallacy. Attention was also called to the inevitable ex- 
termination of the hemlock on account of its extremely slow 
growth and its dependence upon a humid soil for its existence. 
The speaker drew attention to the spreading of the forests in 
the southern part of the state and their encroachment upon the 
prairies and explained it as being largely due to the absence of 
destructive prairie fires which formerly killed all the young trees. 
In closing Mr. Bruncken impressed upon his hearers the 
importance of th^ir influencing legislators by all means in their 
power regarding the importance of re-foresting the denuded 
tracts of our state, as well as the preventing of the unwise destruc- 
tion of forests now existing. 
The following were nominated for membership by Mr. H. 
Nehrling and elected by the directors at the close of the meet- 
ing, — Messrs. Chas. L. Kiewert, Aug. Cloos, A. T. Schoenebeck 
and Carl Schoenebeck. 
Mr. Slocum called the attention of the meeting to the Min- 
ing Congress that was shortly to assemble in the city and to the 
interesting exhibit of minerals that could then be seen at the 
Exposition building. 
The meeting was then adjourned. 
Thursday, July 5, 1900. 
This meeting was held in the usual place, the museum lecture 
room. President Teller occupied the chair and 28 persons were 
present. 
Chas. E. Monroe of the geology section spoke at some length 
on the relation of the formation known as the Lower Heldeburg 
to those lying immediately below and above it, viz : the Upper 
Silurian and the Hamilton, and stated that geologists were at 
present undecided with which it was the more closely connected. 
The speaker said however he hoped during the summer to obtain 
considerable evidence tending to settle the question by taking 
advantage of the opening of a quarry at Lake Church in Ozaukee 
county which cut into this formation. 
Ernest Bruncken described the botanical features of the sand 
dunes at Ottawa Beach in Michigan. They there exhibit all 
stages of formation and are heavily forested with pine and hem- 
lock, with an underbrush of hardwood. Willows of several spe- 
cies are abundant. Sassafras and tupelo were also noted. 
Mr. Teller then spoke on the crustaceans found in the Niagara 
Formation of this vicinity and illustrated his remarks by means 
