Nichols.] 
76 
[October 6, 
[Contains observations at twelve various depths, from 10 to 550 feet, made 
March 23, May 13, July 3, August 5, September 6, October 28, November 26, 
1848, and February 3, 1849. The observations were made by fastening a num- 
ber of slowly acting thermometers, duly protected, at intervals, on one line and 
allowing them to remain over night in the lake. In the morning the line was 
drawn rapidly in and the thermometers read quickly as they appeared at the 
surface. This is one of the most complete series of observations on any of the Swiss 
Lakes.] 
Forel, F. A. — Introduction a l’etude de la faune profonde du Lac 
Leman. Bull. Soc. Vaud., x (1869), pp. 217-223. 
[Contains a review of some of the earlier observations on temperature in the 
Swiss lakes.] 
Forel, F. A. — Nouvelle methode de sondage thermometrique. Bull. 
Soc. Vaud., xiii (1874), pp. 38-45. 
Forel, F. A. — La temperature des lacs geles. Comptes rendus, xc 
(1880), pp. 322-324. 
[Contains the results of observations through the ice on the Lake of Morat and 
the Lake of Zurich, and has been quoted above.] 
Forel, F. A. — La congelation des lacs suisses et Savoyards pen- 
dant l’hiver 1879-1880. L’Echo des Alps, Nos. 2 et 3, 1880. 
Forel, F. A, — Temperatures Lacustres. Recherches sur la tempera- 
ture du Lac Leman et d’autres lacs d’eau douce. Bibi. Univ. Arch. Sci., 
(3) ill (1880), pp. 501-516; iv (1880), pp. 89-106. 
[This has been quoted above.] 
Fteley, A. — Algae observed in storage-basin No. 3, of the Boston 
Water Supply, 1879. First Annual Report of the Mass. State Board 
of Health, Lunacy and Charity, 1880. Department of Health, pp. 121- 
1 28 and plate. 
[Contains also observations on the temperature at top and bottom of pond and 
has been quoted above.] 
Geneve. — Sur les circonstances qui ont accompagne le gel du Lac 
de Geneve, le 15 fevrier, 1854. Verh. d. Scliw. naturf. Gesellsch., 1854 
j). 92. 
[The Lake of Geneva has never been completely frozen as far as known. The 
lower end near Geneva was frozen February 22, 1810, February 23 and 24, 1814, 
February 3 and 8, 1830, and February 15, 1854. The conditions are a very low tem- 
perature for a long time, followed by a strong wind from the North-east, or “ bise ,” etc.] 
Indiana. — Seventh Annual Report of the Geological Survey made 
during the year 1875, pp. 469-495. Observations on the depth and 
temperature of some of the lakes of Northern Indiana, by G. M. Levette. 
[The observations extended over thirteen lakes varying in depth from 10 to 
78 feet. The temperatures were taken with a Miller-Casella deep sea ther- 
mometer; the dates were not given but it would seem that the work was done 
in the month of August. The surface temperature varied from 60°F., to 69° F., 
