THE MOUNT DESERT EEGIOlSr 57 



The intake is of pure lead 2-inch pipe and runs down the 

 side of the outer crib and is connectted with a, cast lead foot 

 valve, while at the tank end of the system there are the 

 proper valves for turning on and off the supply, overflow 

 pipes, and the like. 



The motor and pump are bolted onto a form made of 6 by 6- 

 inch joists, and this in turn is screwed to the dock with 10-inch 

 bronze lag screws. In the fall the motor is disconnected from 

 the long intake pipe, and with the pipe along the dock, the 

 lag screws drawn, then placed on a small truck and wheeled 

 into the laboratory. A heavy plank is slipped dowTi along 

 the lead intake, lashed to it, lifted up and carried into the 

 laboratory, and the pipe along the dock, is disconnected and 

 brought into the laboratory and put on wooden horses to 

 prevent sagging. This takes two men about 3 hours. In the 

 spring the pipes are connected along the dock, the motor 

 wheeled out and the intake placed in position at low tide, the 

 valves connected and everything is ready for work in about 

 5 hours' time. It will be seen that no elaborate apparatus 

 is needed for a marine laboratory, and simplicity should be 

 the rule. 



DREDGING 



The method of carrying out the dredgings was to go to 

 some point that from indications on the chart would look 

 suitable and then drag across this area once, twice, or three 

 times and, of course, the different stations were revisited. 

 When the material came up it was dumped into the sieves 

 and washed down with buckets of water, and each person 

 picked out the forms he was personally checking. While the 

 dredge was down a bottom temperature was taken as well as 

 one at the surface and the exact position of the station was 

 marked on the dredging sheet, thus taking the information 

 at the time and not relying on memory. Into each container 

 was dropped one of the perforated tags from the dredging 

 sheet on which its number was written, and when sufficient 

 material had been obtained the boat returned to the laboratory 

 and the forms were put into the aquaria and then run down. 



