130 



SCIENCE. 



[Voi,. V., No. 106. 



The shock seems to have been most severe 

 in the southern part of Frederick county, Md., 

 where, at Petersville and Lime Kiln, it reached 

 No. 3 of the proposed scale. At most places 

 it did not exceed No. 2, and it is therefore 

 called above a ' light ' shock. There are some 



AMERICAN MILK. 



Some interesting facts have come to light, 

 during the investigations, by the U. S. agri- 

 cultural bureau of chemistry, of the composi- 

 tion of milk. The object of the investigation 



O Not felt. Q Very light. -%- Light. © Moderate. % Not reported. 



EARTHQUAKE, JAN. 2, 1885, 9 H. 12 M., P.M. 



indications, also, of a focus of increased inten- 

 sity in the southern part of the area affected, 

 as shown by the reports from Warrenton and 

 Fairfax, Va., but no confirmation of these was 

 obtained. 



The limits of the shock and its intensity at 

 various places, so far as reported, are indicated 

 by appropriate symbols upon the map, to 

 which the reader is referred. 



C. G. Rockwood, Jan. 



is to determine by large numbers of analyses 

 made under uniform conditions, and on sam- 

 ples from various sources, the average constit- 

 uents of American milk. The work which has 

 been done up to this time has been mostly of 

 a local nature, but sufficiently extensive to 

 give value to the results obtained. 



The specific gravity of milk is 1.030. When 

 the cream has been removed, this number is 

 larger. Twelve samples of milk from Mr. 



