Plate X1Y 



The lines and arrows relate onlu 



"i-ormoy Poinr 



LXPERIMENTS 



come Knoll . PEP . 



kpool closed ground BLACK . 



lesWfrom MorecambeBay Lightship. BLUE . 



UtoTL of Zfie stations 



UniaZeZz/ ihe positions w7ier& tft&fisTt Ttave 



?xtfn&ers repres&nZ lfa& months freZaseetts 



