^6 New YORK: state museum 



over a considerable period to form a basis for the study of these 

 movements. 



The importance of seismological investigations is rapidly gaining 

 recognition in this country; stations are now planned or under 

 installation at Cambridge, Mass., New Haven, Conn., and Ann 

 Arbor, Mich., as part of the scientific equipment of the several uni- 

 versities at those places. In the near future there will thus be a 

 series of stations covering the northeastern section of the country 

 quite completely, as observations are now made also at Cheltenham 

 and Baltimore, Md., and Washingtou, D. C. It may be suggested 

 that the work might be materially advanced by coordination of the 

 different observing points, and it is hoped that some arrangement 

 of the kind will be effected. In chis manner the detection of the 

 small local movements which are apt to be confused with the feebler 

 tremors of distant origin would be specially facilitated. 



The Albany station has been called upon' frequently to supply 

 information regarding earthquake occurrences, both for the press 

 and for scientific purposes. Records have been available some times 

 long before the arrival of telegraphic dispatches from the centers 

 of disturbance. It has also been possible to demonstrate the non- 

 existence of many reported shocks in the neighboring region. The- 

 observations relating to the San Francisco and Valparaiso earth- 

 quakes have been supplied to the California Earthquake Commis- 

 sion and the International Seismological Association for use in the 

 preparation of their reports. 



The year just ended was the first for which a complete series of 

 records has been obtained. In all, 19 disturbances, large and small, 

 were registered. A tabulation of the data is given herewith, ac- 

 companied by notes explanatory of the individual occurrences. 

 Similar information covering the period March 10 to October i, 

 1906, was included in the report for that year. 



The character of the records traced by the instruments differs 

 in each case, and it is not possible to give all the elements for every 

 disturbance. Some of the more remote shocks which are apparently 

 of relatively small proportion cause only feeble vibrations indicated 

 by a slightly wavy line as traced on the recording cylinder. The 

 record of larger earthquakes, on the other hand, is usually resolvable 

 into several portions of distinctive character from which deductions 

 may be made, according to well known principles, as to the distance- 

 traveled by the waves, and the direction and relative magnitude of 

 the disturbance. 



