AMERICAN MIDLAND NATURALIST. 123 
cie in crystal forms as is very common bol quartz or silica 
( 2). It also contains some iron sexqu uloxide (Fe2 03) and vary fre-: 
with sand or pure quartz will, therefore, fire into jasperite by the ap- 
plication of heat, and this is very likely the genesis of the jasperite of 
h ake radio region 
ay gather many interesting facts of the glacial geology of 
o as from this piece of jasperite which explains some 
of the features of local geography and glacial geology 
Birds Found in Van Buren o Mich., from July 4 
, to August 13, 1909. 
BROTHER ArPHONSUS, C. S. C. 
July is the month when summer residents among the birds may be 
count e song season for a number of species, such as the Mises 
and Red-Ey Vireos, Towhee, Scarlet ibe aac Indigo Bird, Song 
Field Sparrows, lasts almost through the s 
In this county the writer saw all leti one n species not 
seen by him in June in St. Joseph Co., I The Rose-breasted Grosbeak 
Was not seen here. The large lakes and swampy land ar em, in 
Van Buren County, enabled the writer to find most of these birds n 
S in St. J County in June we ot found here in July 
pecies seen i . Joseph re 
These are: Bobolink, Cowbird, House Wren, Nighthawk, Swamp Spar- 
dstart. 
is interesting to note that a short distance from Bankson Lake, 
near Lawton, Mich., certain species of birds may be found which are not 
