86 Walker’s Statistical Atlas of the United States. 
and upward. The magnificent forests found from Minnesota 
aine are in regions of 28 to 40 inches, a raritell: recisely 
same rainfall as large portions of southern Minnesota lying in 
the same comggerss and nearly reece Interrupted prairies 
extend across Mississippi and Alabam , where we have the 
heaviest rainfall east of the Sierra Nevada 
Again, compare the woodland map with that of “storm 
centers” and prevailing wanes. The regions of numerous storm 
heavily timbered ; the pile region of eastern Nebraska is al- 
most treeless. A comparison of the regions of more or less 
winds ee similarly diversified facts. While there is un- 
doubtedly a very intimate relation between forests and rain- 
fall sie the latter is less than 25 inches annually, where the 
uantity is above that, certain relations which are zealously 
claimed to exist, are shown y these maps either to not exist 
at all, or else that the relative dependence has been vastly 
overstated. The map of the Coal measures is especially impres- 
sive, and we hope to see the excellent map of “Geological 
formations” struck off in a separate edition for the use of stu- 
dents and travelers 
, rhe five memoirs of this pest are by as many anthors. 
States” iby” Prof. J. D. Whitney) is a model of comprehensive 
condensation. Further notice of this physical part is reserved 
for another number. 
Part 2d, devoted to “Social and Industrial Statistics,” 
nine maps relate to wee six maps and three a to 
the distribution of wealth, pubis pamerame taxation, illit- 
tio 
The memoir by Prof. Walker, on the “ ages of the Na- 
tion,” is oe Sel ae in the vehi and is speciall y illustrated 
by thi , eleven of which illustrate density and distri- 
Bation oF re opm ation. In his discussion of the subject, a region 
assumes the dignity of a settlement when the census-taker can 
find a population of two per square mile. The white popula- 
