82 Scientific Intelligence. 



bearing on the complex problems of the inter-reactions of toxins 

 and anti-toxins, from the standpoint of the physical chemist, the 

 subject matter is presented in a clear and precise manner. The 

 introductory portion is devoted largely to a general discussion 

 of toxins, agglutinins, hemolysins, etc., and their anti-bodies. 

 Throughout the book the writer emphasizes the possibilities and 

 value of representing by formulae the reactions that take place 

 among the anti- bodies, and which he regards as being of a 

 strictly chemical nature. The principles of physical chemistry are 

 applied to the following topics : Reversibility of Reactions 

 between Anti-bodies ; Velocity of Reactions ; Equilibria in 

 Absorption Processes; Neutralization of Hemolytic Properties 

 and of Toxins ; Compound Hemolysins, and Precipitins and their 

 Antibodies. The book contains a comprehensive bibliography as 

 well as an index of authors and of subject matter. l. f. r. 



II. Geology and Mineralogy. 



1. Geological Survey of New Jersey: Annual Report of the 

 State Geologist, Henry B. Ktjmmel, for the year 1906. Pp. 

 vii + 192 with 32 plates and 9 figures. Trenton, New Jersey. — 

 This volume contains, beside the administrative report, papers by 

 four authors, as follows : The fire-resisting qualities of some 

 New Jersey Building Stones by W. E. McCoitrt (pp. 17-76). 

 The resistance to fire was found to be greater in rocks of fine 

 texture and small porosity. Clay and limonite were the least 

 resistant cementing materials. The Glass-sand Industry of New 

 Jersey, by Henry B. Kummel and R. B. Gage (pp. 77-98). The 

 Origin and Relations of the Newark Rocks, The Newark (Tri- 

 assic) Copper Ores of New Jersey, Properties of Trap Rocks for 

 Road Construction, are three papers by J. Volney Lewis (pp. 

 97-172). In the discussion of the various hypotheses of the 

 mode of origin of the Newark Rocks, Professor Lewis shows 

 reasons for abandoning the tidal estuary and the lake basin 

 hypotheses and favors the hypothesis that these rocks were laid 

 down by rivers on a piedmont plain, accumulating to a great 

 thickness on certain areas of subsidence. Notes on the Mining 

 Industry, by Henry B. Kummel (pp. 173-181). J. b. 



2. Indiana. Department of Geology and Natural Resources. 

 Thirty-first annual report. W. S. Blatchley,- State Geologist. 

 Pp. 772, many maps and illustrations. Indianapolis, 1907. — This 

 report includes ten papers by eight authors. Beside the intro- 

 ductory chapter there are seven papers of an economic character 

 on peat, iron ore, petroleum, natural gas, and mine inspection. 

 The volume closes with the following papers of a biological 

 character. A preliminary list of the Arachnida of Indiana, with 

 keys to families and genera of spiders, by Nathan Banks ; and 

 Notes on the Ci'ayfish of Wells County, Indiana, with description 

 of a new species, by E. B. Williamson. j. b. 



