38 



56. Caswellite. Franklin Furnace, Svissex County, N. J. 



Exhibited by Wallace G. Levison. 



57. Crystallized Pectolite, showing terminated crystals, 



Paterson, N. J. Exhibited by A. H. Ehrman. 



58. Meteoric Iron found at Locust Grove, Henry County. 



North Carolina (Saratite variety of Brezina.) 



59. Meteoric Iron, Forsyth County, Georgia, polished etched 



section. 



These tvs^o last irons are interesting, inasmuch as they 

 do not show the Widmanstatten figures M^hen etched, 

 as nearly all meteoric irons do. 



Nos. 58 and 59 are exhibited by George F. Kunz. 



60. Zincite (ruby-red), in translucent Willemite, very large 



specimen ; Franklin Furnace, New Jersey. 

 Exhibited by Wallace G. Levison. 



J 



PALEONTOLOGY. 



In Charge of Gilbert van Ingen. 



Petrotome. a Machine for Cutting Rocks, Minerals 

 and Fossils with Precision. Exhibited by the in- 

 ventor. Prof. William B. Dwight, Vassar College, 

 Poughkeepsie, N. Y. 



The purposes of this machine with its accessories ai'e : 



( 1 ) The facile, firm and accurate adjustment of the plane 

 of any rock or mineral, from the smallest to quite large 

 sizes, however irregular in shape and however fragile; 



(2) the adjustment and control of the cutting disk by ad- 

 justable friction-rollers, so that the sectioning can be done 

 by either small or large disks (/. e.^ from six to twelve 



