Show 262 ending about June 15 every year materially decreases the salt content of the water as compared with the period of late November when the lake reaches its lowest point Obviously it is the relationship between the amount of water annually coming into the lake and the evaporation of water from its surface that determines the rise and fall of its level Water coming into it is in the form of pre- cipitation over the lake and water reaching the various streams that bring run-o- ff water it by way of from the sur- rounding mountains Climatic conditions remaining approximately the same this balance should keep the lake at about its present level However the increasingly high percentage of river water that is being diverted for irrigation purposes has greatly diminshed the amount of water reaching the lake from that source and has doubtless had its effect upon the lowering of the lake level since the 1870’s As a result there have always been men who predicted the complete drying up of the lake Water evaporation in the Great Basin is tremendous during the summer months One estimate places the amount of evaporation in inches "from 60 inches at the north to 150 inches at the south” An evaporation experiment fl-nnn- station 1 was G K established at Midlake on Gilbert Lake Bonneville the Lucin 7 Cut-o- ff in |