26 



NEW YORK STATE MUSEUM 



at 4000 miles from Albany. The shocks appear to have left no 

 trace 011 land and can be assigned without much doubt to a sub- 

 marine source. 



February I. Slight movements of unknown origin. 



March 26. A record of the earthquake that occurred in the 

 State of Guerrero, Mexico, and is reported to have destroyed 

 Chilapa, a town 115 miles south of the City of Mexico. Two 

 distinct series of vibrations were registered, beginning nearly five 

 hours apart. The first was the more violent and represented the 

 distinctive shocks. The records by both pendulums were of the 

 same degree of magnitude. The indicated distance of the origin, 

 according to the Omori formula, was 3000 miles, which is about 

 the actual distance. 



May 15. Small vibrations, lasting about 40 minutes. No in- 

 dication of origin shown by the records. The shocks were regis- 

 tered also by the station operated by the Weather Bureau near 

 Washington and according to its reports were probably from a 

 source in Central America or in the adjacent region of the Pacific. 



August 13. An indefinite microseism somewhat similar in char- 

 acter to the preceding. 



September 21. Perhaps connected with a submarine earthquake 

 reported as causing heavy waves off the coast of Mexico on Sep- 

 tember 23. 



MINERALOGY 



In the section of mineralogy, the work of research has pro- 

 gressed along the lines of a monograph on the crystal forms of 

 New York calcite, now nearing completion. A mass of excellent 

 material from a number of widely distributed localities was avail- 

 able for this study, which has already yielded eight forms new to 

 the species. 



A notable collection of minerals from the celebrated localities of 

 northern New York and Canada has been acquired by purchase 

 from Mr A. F. Nims of Philadelphia, N. Y. This collection which 

 was assembled by the late Charles D. Nims contains many excellent 

 specimens from localities no longer accessible, particularly a series 

 of 225 specimens of danburite from Russell, St Lawrence 

 co., a large suite of oligoclase from Fine, St Lawrence co. includ- 

 ing many specimens which give fine moonstone reflections and 

 several large crystals twinned according to the albite law. 



