235 



water, but during the past two years no difficulty has been experienced in tilling 

 them; two or three feet ot water flowed over the Gordoniere Marsh, which is now 

 dry with beach lines forming along its margin; and boats were rowed over all 

 parts of the Johnson Marsh, while at present hardly any of its surface is sub- 

 merged. 



Consult Hydrographic Map Next to Frost Cover. 



TEMPERATrRE OF TcRKEY LaKE. By .J. P. DOLAX.* 



In making these obj^ervations a Charles Wilder standard, protected, thermom- 

 eter was employed. They were begun the 13th of July, during which month four 

 soundings were taken in the deepest parts of the lake from the surface to the 

 bottom at every five feet. Then on October 5 two records were made at about the 

 same points, and again on November 2. 



iSeptember 17 a rain guage was set up and from that day to the present a 

 regular record of temperature, precipitation, direction of wind and rise and fall 

 of lake has been kept, but the observations have been confined to the northwest 

 part of the lake; properly, Syracuse Lake. 



I. TEMPKEATURES IIF TURKEY LAKE, l-»i. 



July. 



Xov.2.Dec.14. Dkc.24. 



Indiana Ukiversity Biolog- 

 ical Station. 



13th, 

 10 a.m. 



16th, 



8:45 



A. H. 



ITth, 

 9::i0 



23d, 

 8:45 



i.r. 



Bio. 



Stat'n 



11a.m. 



Jar- 

 rett's 

 Bay. 



1:45 



p. M. 



I.U. 



Bio. 



Stat'n. 



11:10 



A. K. 



Black 

 Stump 

 Point. 



10a.m. 



Air 



Surface 

 5 feet- 

 10 

 15 

 20 

 25 

 30 

 35 

 40 

 45 

 50 

 55 

 60 

 65 

 67% 



Deg. Deg. 

 74 75 



73 



72>^ 



71 



68 



65 



60 



60 



59 



59 



58 



58 



58 



i r 



Deg. 



74^-0 



mi 



68>| 



Deg. 



72 

 76}^. 



71 



70 



Gl% 



oSVi 



58 

 58 



Beg. 

 65 

 60% 

 60 

 60 

 59 

 581^ 

 58y2 

 5S% 

 58^ 



o8H : 



58>4 I 

 58'4 I 

 58>i 

 58 



Deg. 



61'A 

 60% 

 .59 

 59 



58>| 



5S% 



58>| 



58 



58 



58 



58 



57% 



56% 



53^4 



■-'Contributions from the Zoological Laboratory of the Indiana University, No. 15. 



