178 W. H. HOBBS — CHANNELS SURROUNDING MANHATTAN ISLAND 



island to connect with the East 

 River section (see page 170). 

 The results obtained from the 

 borings in the Hudson River 

 section are displayed in figure 

 23, which is reduced from a 

 drawing furnished the writer 

 by Mr Charles M. Jacobs, chief 

 engineer of the North River sec- 

 tion. On the Weehawken shore 

 the core drills were driven to 

 different depths, the maxi- 

 mum depth of 237.8 feet be- 

 ing reached in the hole sunk 

 700 feet out from the shore. 

 In all of these borings only 

 Newark formations were en- 

 countered, and in all save one 

 only red and white varieties of 

 sandstone. In drillhole num- 

 ber 13, which is nearest the 

 foot of the Palisades, the sec- 

 tion penetrated by the drill 

 showed baked shale between 

 the depths of 20 and 68 feet, 

 and below that point, to a 

 depth of about 80 feet, Newark 

 basalt. The sandstone slopes 

 away from the shore towards 

 the bluffs along a low angle. 

 On the Manhattan shore the 

 nature of the slopes toward 

 the channel indicate that the 

 gneiss continues to the bot- 

 tom, though the borings are 

 all wash borings. 



Proposed New York and New 

 Jersey bridge. — This project con- 

 templated at first a cantilever 

 bridge and later a stiffened sus- 

 pension bridge across Hudson river at such place between Fifty-ninth 

 and Sixty-ninth streets as should be approved by the Secretary of War. 



