MEASURING THE EARTH'S SURFACE. 253 



one which has heen actually laid out and measured. This net is a part 

 of the work done hy the United States Geodetic Survey, and is that 

 portion of it which covers the whole State of New Jersey. It is copied 

 from reports kindly furnished hy Mr. G. H. Cook, State Geologist of 

 New Jersey. It includes all the stations in New Jersey, and a few in 



