Plate V. 



Fig. 1. — Sub-division of the pond marked III on the general plan, viewed at low tide, 

 patches are mud flats ; the light patches are shallow pools of water. 



The dark 



Fig. 2.— The plant viewed from the southwest side. A floating walk connects the engine house 

 with the shore. The tall piles hold the rafts in place. The sea-wall is seen in the back- 

 ground. 



