124 



tends to separate somewhat, as it slides down the pile, and the greater the distance 

 it has to slide the more is the likelihood of getting a poor mixture. 



On November 6, 1920, in the presence of the Committee, Mr. Camp coated two 

 experimental piles by his process. These were full-sized piles, but were experimental 



Fig. 46. (1) Lower forms used in Camp process. Note metal fingers supporting canvas web, to keep 

 concrete from dropping tlirough. 

 (2) Pile jacketed with cement by Camp process, being pulled for examination. 



in that they were merely set in the mud instead of driven, so that they could easily 

 be pulled for examination. One of them was set in water 28 feet deep at low tide and 

 the other in 18 feet of water at low tide, both in strong tidal currents. On the long 

 pile, approximately 40 feet of concrete was placed, extending into the mud to a depth 

 of 2.8 feet. This was done in 32 minutes. On the other the concrete was approximately 

 28 feet long and required 21 minutes to place. 



