Reviews — Iron Mining in New Jersey. 521 



characters shown by the fossil prove the remains to belong to Iguanodon 

 Mantelli, but all examples hitherto found have manifested this species 

 to be much smaller than Iguanodon Bernissartensis, whereas the bones 

 discovered belonged to a reptile equalling, if not exceeding, the 

 dimensions of that species. Among the skeletons of Iguanodons 

 found at Bernissart in 1878, M. Dollo found a small and a large form. 

 The former resembled in all points the type-specimen of Iguanodon 

 Mantelli', and he thought that the differences between the two forms 

 were specific and not sexual. This specimen opens the question again, 

 and the author criticized the evidence, and inclined to the opinion 

 that the osteological variations are sexual and that Iguanodon Bernis- 

 sartensis is probably a synonym of Iguanodon Mantelli. 



The second part of the paper dealt with the adaptation of the 

 Jguanodont pelvis to enable an upright position and progression, and 

 discussed the variations in the Dinosaurian pelvis. 



REVIEWS. 



I. — Iron Mines and Iron Mining in ISTew Jersey. By "William S. 

 Batley. [Vol. VII of the Final Report Series of the Geological 

 Survey of New Jersev; Henrv B. Kiimmel, State Geologist. 

 Trenton, N.J., 1910.] 



fllHE object of this Report is to record in one volume the principal 

 I facts relating to the distribution and mode of occurrence of the 

 iron-ores in the State. The records scattered through forty volumes 

 of Annual Reports have been examined and utilized wherever expedient. 

 The history of every mine, so far as known, has been briefly mentioned, 

 and practically every iron-working has been visited. The commercial 

 analyses have been tabulated and more complete ones have been added. 

 The volume in short contains a most valuable summary, including 

 much new information, of all that is known of the New Jersey iron- 

 ores, with references also to opinions concerning their origin. 



The ores comprise Bog Iron-ores, Brown and Red Haematites, and 

 Magnetic Iron-ores. The history of the mining dates back to 1685, 

 soon after English settlers first entered the borders of the State. The 

 Bog Iron-ores were then worked. They comprise impure hydrated 

 oxides, accumulated in bogs and swampy places where iron-bearing 

 solutions were exposed to the action of the atmosphere. It is noted 

 that within recent years the ore has met with some favour as a road 

 metal, " a use to which it is well adapted when properly mixed 

 with sand." 



Brown Haematites or Limonites have been worked to a small extent, 

 chiefly in the Kittatinny Limestone of the Cambrian, in cracks and in 

 lenticular masses along bedding-planes of the strata, near their contact 

 with the underlying gneisses. At the Edsall Mine the ore appears to 

 be in the white Franklin Limestone of the Algonkian, near its contact 

 with gneisses. Elsewhere it has been found in Cambrian slates and 

 quartzites. It has nowhere been worked to any large extent. 



Still less has the Red Haematite been worked. It occurs in shalv 



