235 



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

 them; two or three feet of 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 Front Cover. 



Temperature of Turkey Lake. By .J. P. Dolan.* 



In making these observations 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 tlie 

 same points, and again on November 2. 



September 17 a rain guage was set uj? 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. TEUPHRATURES OP TURKEY LAKE, 1MI.5. 



July. 



Indiana University Biolog- 

 ical Station. 



13th, 

 10a.m. 



16th, 

 8:45 



A. M. 



17th, 

 9:30 



23d, 



8:45 



Oct. 5. 



I.U. 

 Bio. 



Stat'n, 



11a.m. 



.Jar- 

 hett's 

 Bay. 



1:45 



p. M. 



Nov. 2. 



I.U. 

 Bio. 



Stat'n, 



11:10 



A. M. 



Dec. 14. 'Dec. 24. 



Black 

 Stump 

 Point. 



10a.m. 



Air 



Surface 

 5 feet. 

 10 " . 

 15 " . 

 20 " 

 25 " . 

 30 " 

 35 " . 

 40 " . 

 45 " .. 

 50 " . 

 55 " . 

 60 " .. 

 65 " .. 

 673^ " . 



Deg. 



8IX2 

 74 



73 



71 

 68 

 65 

 60 

 60 

 69 

 59 

 58 

 58 

 58 



Deg. 



83K 



Deg. 



78)4 

 75 



Deg. 



72 

 76>^ 



75 



6814 



68>4 



71 

 70 



671^ 

 61>4 



58)4 



Deg. 



65 



6034 



60 



60 



59 



583^ 



58H 



581% 



58^ 



5831 

 583| 

 58 Vj 

 5834 

 58 



Deg. 



61^ 



6034 



59 



59 



5834 



583^ 



58>4 



5834 



58 



58 



58 



58 



5734 



56^4 



533i 



Deg. 



50 

 43 



43 



Deg. 

 28 

 3434 

 3434 

 34H 



43 

 433^ 



35 



353^ 

 "35K 



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



