108 The American GeolocjisL February, ih»5 
beach, therefore, lias any connection with the Chicago outlet 
unless they change the attitude of their planes southward in 
a very exceptional manner. The nodal points of both beaches 
are a little farther south on the east side of the lake than on 
the west. But if the Nipissing beach extends as far south as 
Chicago in the same plane it passes 120 to 180 feet below the 
present lake level at that place, and the upper beach with a 
slightly steeper descent probably strikes nearly as deep. 
The West Ilnron Shore. So far as relates to postglacial 
submergence the eastern coast of Michigan from Cheboygan 
nearl}' to Port Huron is almost a terra incoynita. Dr. Spencei' 
has located the Algonquin beach along that shore conjectur- 
ally, and he is probably correct in making it pass under the 
water of Saginaw bay.* But this beach, even where lowest 
towards the south, has always been found to be at least a few 
feet above the Nipissing beach. As a boy the writer remem- 
bers very well seeing the great sand spit which forms the east 
shore of Thunder bay at Alpena, and also the sand)'^ road 
along the shore westward. Presque Isle and the numerous 
littoral lakes of that coast stronglj^ suggest similar shores 
elsewhere which owe their modification to the Nipissing 
beach. But this is all that can be said of this coast at pres- 
ent. 
The Kant Huron Shore. As to the east side of lake Huron, 
the facts at hand are almost as meager. At North Bay the 
Nipissing beach is about 160 feet above the lake. At Parry 
Sound it is very doubtful whether the small gravel delta at 
about 50 feet in the village is the Nipissing beach. At Mid- 
land there is a strong sandy terrace at about 50 feet. It is 
the lowest and much the strongest of the series near the lake 
shore, as described in the fifth paper, and it was easily fol- 
lowed about four miles westward around the head of the bay. 
This shore line compares very favorably with the Nipissing 
beach as seen elsewhere. But it is the only locality on this 
coast south of North Bay where I have had a good chance 
to see Nipissing beach. In this region, however, my w^ork 
overlaps that of Dr. Spencer, who has described the abandoned 
beaches of the south coast of Georgian ba}'" and the east coast 
*"I)efoiTniitioii of the Algonqviiii Bpiu-li and Hirtli of T^aki' Huron,"' 
by ,1. \V. Spi'uccr. Am. .Jour. Sci , vol.xi.i, .Ian., ]8!)1. 
