710 PROCEEDINGS OF THE BALTIMORE MEETING 



of the weight of the mass of metal would furnish a ready and rational basis 

 for rating the intensity of an earthquake shock. 



(8) Such an apparatus would naturally give only a single component, such 

 as east or west. As with other forms of seismograph, three units would be 

 required to furnish a complete history of the value and direction of the total 

 force. 



(9) The instrument here suggested may possibly by itself be made to give 

 indications of some value regarding maximum intensities, and, taken as supple- 

 mentary to the record of a displacement seismograph, might serve to give val- 

 uable collateral indications regarding the various characteristics of the dis- 

 turbance. 



(10) Preliminary trials with an instrument made up with a special form of 

 diaphragm pressure-gauge indicate results of a hopeful character, and an in- 

 strument more definitely planned for seismographic work is now under con- 

 struction. 





