181 



The Magazine of Natural History. New Series. December, 1839. 



Conducted by Edward Charlesworth, F. G. S. &c. — From the 



Editor. 

 The Charge delivered (by Judge Logan,) from the Bench to the 



Grand Jury, at the Court of the Quarter Sessions, held for the 



County of Philadelphia, the second day of September, 1723. 



Published at the desire of the said Grand Jury. Together with 



their Address. 4to. Philadelphia, 1723. — From J. J. Smith, 



Jun. 



Mr. Geo. M. Justice presented an original document con- 

 taining William Penn's objections to the accounts of his stew- 

 ard, Philip Ford, which exhibited overcharges on Ford's part 

 to the amount of 9697 pounds, and stating William Penn's 

 reasons why he submitted himself to their "unnatural confine- 

 ment of him to the Fleet." 



Mr. Lea read a paper on the Patella Amsena of Say, which 

 was referred to a Committee. 



Professor Bache read a paper entitled " Observations of the 

 Magnetic Intensity at twenty-one Stations in Europe," which 

 was referred to a Committee. 



A communication was read from Dr. Locke, of Cincinnati, 

 containing an account of magnetic observations at several 

 places in the north-west of the United States, which was re- 

 ferred to a Committee. 



Dr. Patterson exhibited some specimens of the Heliographic 

 Art (Daguerreotype) of a large size, executed by Mr. Robert 

 Cornelius, of Philadelphia; and stated to the Society, that Mr. 

 Cornelius had succeeded in obtaining beautiful representations 

 upon highly polished silver plate. 



Mr. Saxton exhibited additional medals obtained by the gal- 

 vanic process of Professor Jacobi; and likewise pieces of char- 

 coal and anthracite, which he had used as substitutes for the 

 forms of fusible metal ordinarily employed. These were per- 

 fectly coated with copper, a fact which shows it to be but 

 necessary, that the substance at the negative electrode should 

 be a conductor of electricity. 



