Scientific Intelligence — Mineralogy. 361 



In July 1850 the Government Reports of the Natural History 

 of the State of New York were sent over as a donation to the Free 

 Library and Museum of the borough of Salford ; and shortly after- 

 wards, on examining the geological division of that work, I found 

 that the same peculiar crystal had been observed in the district 

 lying to the south of Lake Ontario. In Part III., pages 102 and 

 103, Mr Lardner Vanuxem notices them thus : — " Hopper-shaped 

 cavities, Onondaga Salt Group. These forms and cavities are of 

 great importance, for they were produced by common salt, no other 

 common soluble mineral presenting similar ones. They are found 

 in the gypseous shale or marl in its more solid and slaty parts." 

 A drawing is given of specimens (from Bull's Quarry, town of 

 Lenox, Madison county) in which the pseudomorphs resemble 

 those found in Cheshire and Gloucestershire which have come 

 under my notice. 



In Part IV., page 127, Mr James Hall mentions that similar 

 crystals were found in Wayne and Monroe counties, but that he 

 had rarely observed them in Genessee or Erie counties, the most 

 perfect which he had seen being at Garbutt's Mill on Allen's Creek. 

 Part III. was published in 1842, and Part IV. in 1843. 



In making those observations, I must not be understood as in 

 any way attempting to take from Mr Strickland the credit of a dis- 

 covery ; before he directed special notice to it, the matter was only 

 incidentally mentioned, and he was doubtless quite as much un- 

 aware that it had been noticed before, as Professor Calvert or my- 

 self were. My object has been to direct attention to this matter as 

 shewing the great extent of country in which this singular crystal 

 is found. The observations of Mr Strickland and myself shew 

 that it is found in the Keuper sandstone through a considerable 

 portion of Gloucestershire, and I have noticed its frequent occur- 

 rence in Cheshire; Professor Phillips has found it in Worcester- 

 shire, and Dr Percy in Nottinghamshire. The observations of 

 Messrs Vanuxem and Hall shew the existence of a similar pseudo- 

 morph in North America, in the district to the south of Lake On- 

 tario, extending from Erie county through Genessee, Monroe, and 

 Wayne to Madison county. There, however, these crystals are 

 found in the Onondaga salt group, belonging to the upper Silurian 

 division. 



6. Note on the occurrence of similar Crystals; by W. W. 

 Smyth, Esq., F.G.S. — The presence of pseudomorphous crystals, 

 similar to the above mentioned, in several divisions of the trias, has 

 long attracted notice on the Continent, and has been detected at 

 very numerous points scattered over a large proportion of Northern 

 Germany. In Leonhard and Bronn's Journal for 1847, Gutber- 

 let has devoted an elaborate paper to the description and geo- 

 logical discussion of those more particularly which occur in beds 

 of variegated marls between the Bunter sandstein and the Mus- 



