REVIEWS 377. 
as possible, to establish if possible a system of forestry which will pro- 
duce lumber timber in less than 150 years, and mine timber in less 
than roo years. 
The principal subjects discussed in the several divisions of the 
report embrace the topography, the limits, the agricultural lands, the 
mining and the forests of the reserves. Other topics include the water 
supply, parks species of timber, classification of timber, amount of 
available timber, and means of transportation of lumber. 
The report is furnished with an excellent set of illustrations and 
maps. It is a valuable contribution, well calculated to accomplish the 
purposes for which it was written, z. ¢., to furnish as full data as possi- 
ble concerning our forests, and to waken a desire for their preservation. 
W. N. Locan. 
Geology of Narragansett Basin. By N. S. SHacer, J. B. Woop- 
WORTH and A. F. ForrsteE. Monograph XXXIII, U. S. 
Geological Survey, pp. xx + 394. 1900. 
The Monograph is divided into: Part I, General Geology of the 
Narragansett Basin, by N. S. Shaler; Part II, Geology of the Northern 
and Eastern Portions of the Narragansett Basin, by J. B. Woodworth, 
and Part III, Geology of the Carboniferous Strata of the Southwestern 
Portion of the Narragansett Basin, with an account of the Cambrian 
deposits, by Aug. F. Foerste. 
The stratified rocks of the basin range from Cambrian to Carbon- 
iferous. The structure of the basin makes it appear probable that it 
originally contained an extensive development of pre-Cambrian rocks. 
Upon these were laid down the lowest Cambrian beds. The Middle 
Cambrian is not represented in the region south of Braintree. ‘The 
Upper Cambrian is represented only by pebbles of quartzite in the con- 
glomerates. While only the Lower Cambrian is found in situ, pebbles 
of Middle and especially of Upper Cambrian are so abundant as to lead 
to the statement that “there appears to have been nearly continuous 
deposition in this field throughout the Cambrian period.” The 
Silurian and Devonian do not appear to be represented in the Narra- 
gansett Basin. Upon the Cambrian strata and the eruptive granites 
come the Carboniferous strata which occupy the greater part of the 
_ basin. It is probable that the earliest Carboniferous rocks of the basin 
are the upper part of the Coal Measures, and it is possible that the upper 
conglomerates of the basin may be Permian. The basin was probably 
