9G 
B LORI DA GEOLOGICAL SURVEY. 
138. McGee, W. J.— 
The Lafayette Formation. 
U. S. Geol. Sur. 12th Ann. Kept. pt. 1, 347-521, 
1891. 
139. McGee, W. J.— 
Discussion following paper by J. W. Spencer on, 
“Terrestrial Submergence southeast of the Ameri¬ 
can Continent.” 
Geol. Soc. Am. Bull. V, 21-22, (1-2 p) 1893. 
140. MaClure, William— 
Observations on the Geology of the United States. 
Am. Philo. Soc. Trans. VI, 411-428, map, 1809; 
Jour, de Phys. LXIX, 204-213; ibid. LXXII, 137- 
165, map, 1811. 
141. MaClure, William— 
Observations on the Geology of the United States 
of North America; with remarks on the probable 
effects that may be produced by the decomposition 
of the different classes of Rocks, on the nature and 
fertility of soils; applied to the different States of 
the Union, agreeably to the accompanying geolog¬ 
ical map. 
Am. Philo. Soc. Trans. I, (n.s.) 1-91, 2 pis. and 
map, 1818. Published in book form Philadelphia, 
1817. 
This is a revised and enlarged edition of the above. 
The rocks of Florida are referred to the Alluvium class of 
the Wernerian system. Northern Florida as far south as 
the line crossing the peninsula, just below St. Augustine, 
is included in the map and represented as alluvial. 
142. MacGonigle, John N.— 
The Everglades of Florida. 
Rept. of the 8th. Inter. Geol. Cong, held in the 
United States in 1904, 767-771, 1905. 
