54 JOURNAL OF THE [April, 



dress, entitled " Structure in Steel," illustrated by numerous spe- 

 cimens. 



OBJECTS EXHIBITED. 



1-35- Specimens of Steel, illustrating the Annual Address : by 

 P. H. Dudley. 



36. Polycistina from Enterprise, Miss,, prepared and donated 

 to the Society by Mr. K. M, Cunningham : by J. L. Zabriskie. 



37. A new Microscopical Lamp, manufactured by James Strat- 

 ton & Son : by J. L. Zabriskie. 



38. Transverse section of stem of Wistaria, double stained : 

 by Frank D. Skeel. 



39. Transverse section of quill of Porcupine, double stained r 

 by J. D. HvATT. 



Mr. Zabriskie remarked concerning the microscopical lamp 

 invented and manufactured by James Stratton & Son, 207 

 Spencer street, Brooklyn : It is remarkable for its compactness,, 

 its ease and variety of adjustments, its efficiency, and its very 

 moderate cost. It stands upon a marbleized slate base three and 

 one-half inches square. From one corner of this base rises a firm 

 metal post three inches in height. A joint at the upper extremity 

 of this post carries a two-jointed metallic arm, which in turn sup- 

 ports a bull's-eye lens nearly three inches in diameter, and the 

 lamp-bowl surmounted by its glass chimney and japanned me- 

 tallic shade. All the metal parts, excepting the base, burner, and 

 japanned shade, are nickel-plated. The range of motion in the 

 two-jointed arm, and the angle at which the lamp-bowl can be 

 safely inclined when elevated, give a surprising variety of eleva- 

 tions and inclinations for the body of light passing through the 

 bull's-eye. Discs of ground and blue glass are supplied for the 

 conical opening of the metallic shade, which discs can be adjusted 

 or removed with the greatest facility. The metallic shade fits 

 loosely upon the burner of the lamp, and is also separate fron> 

 the metal mounting of the bull's-eye. So that the varying effects 

 of light, from the flat side or from the edge of the flame, can be 

 obtained by merely revolving the lamp-bowl, while the shade, 

 the bull's-eye, and all the appliances of the microscope itself 

 remain in their last appointed positions. And further, if light is 

 desired momentarily upon the table, it is only necessary to revolve 



