774 THE AMERICAN NATURALIST. 
volume is thoroughly indexed, and in an appendix are printed the 
laws of Maryland relating to highways. In this volume, as in the 
earlier ones, the wealth of illustration is an especially marked 
feature. Separate colored maps of every county show the different 
kinds of roads and the distribution of rocks available for road build- 
ing. The chapters on construction, tests, and administration — 
about one-half the book — are a complete summary of modern road- 
making methods and have a wide interest outside of the state. The 
bibliographies are very complete, and the method of road adminis- 
tration of all the states of the Union and many foreign countries is 
concisely summarized. If publication by the state of an attractive 
book of instructions tends to produce good roads, Maryland, in this 
respect, is far in advance of other states. 
LAL IE 
