BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 47 
TABLE 10.—WATER TEMPERATURE AT Noon, Woops Ho.Le StTarIon. 
January. February. March. April. 
Years. i l 
Max. | Min. | Mean. | Max.| Min. | Mean. | Max. | Min. | Mean. |Max.| Min. | Mean. 
yf ie | 
TQO2.. ss eeeeeee Blu Tatalelc(e's\vieis vices’ 34-5 | 20-5 31-7 31-5 ,428.0 29-3 42-5 | 32-5 36.6 52-0 | 41-5 45-8 
USERS eeaTeteie etal avotele wicin'ore erat uve e's olevare\s 36.5 | 29.5 33-0 35-0 | 30.0 32-4 44:0 | 34.0 39-6 50-5 | 44-0 46.6 
BQOA Mo ainie aiv'e\e = .alelsieleis sicleiecieeaecccic 32-0 |428.0 29-5 29.5 | 28.5 29-1 39-0 | 29.5 33-8 45-5 | 36-5 41-3 
Ths 2 AA GOg SES AOOr. ODD DUO DUO pas 35-0 | 29-5 | 31-0 | 30.0] 29.0 29:5 | 39-5 | 29-5 | 32-9 | 48-0 | 39.5 42-9 
NAMM GUM etatafe!eiciwici6i0\0/210 Ciayw's /e!e!<1 6 s}sVare 39-5 | 33-5 36.5 37-9 | 33-0 | 34-7 | 380 | 32-5 35-2 48.0 | 37-0 42-7 
UISTORU CARS oriye, o.< 6 5.0, ,of5is sid e.0.6 39-5 |428.0 | 32.33 | 37-0 |428.0 | 31-00 | 44.0 | 29.5 | 35-64 | 52.0} 36.5 43-90 
May. June. July. August. 
Years 
Max. | Min. | Mean. |Max.| Min. | Mean. |Max.| Min. | Mean. |Max.| Min.| Mean. 
MRR es BeOS os /ursi dd lofele aie tetela'e os 59-0 | 51.0 54-6 65-0 | 58.5 62.9 69.0 | 64.0 66. 7 71.0 | 68.0 69.3 
REM aMiaiatsleLat oleate nalaie {nies 0'a,6)0/s/0 «\s ta. 61.0 | 50.0 59-0 62.5 | 59.0 61.3 70.5 | 63-0 67.9 69.5 | 63-0 67-7 
(0 oo. \SNaOHS a aR eee 61.5 | 46.5 54-1 69.0 | 58.5 62.8 73-0 | 67.0 69.8 72.0 | 69.0 70.2 
SMPSIRTE Ta \alelalers es! <l's|s,< o's S's, 0 oe ei stclaicls 59-0 | 47-0 52.8 66.5 | 575 62.0 74-0 | 66.0 70.4 73-0 | 67.5 70.0 
UP ETS 100 G0 QADODENGS 005 Sagoo NEIOE 58-5 | 48-5] 54-r | 68.5 | 58-5 | 63-2 | 73-0] 67-0] 69.3 | 74.5 | 69.5 71.4 
uve vedrse Af) MO ches as | 61.5 | 46-5 | 54-92 | 69.0] 57-5 | 62.42] 74-0] 63.0| 68.83 | 74.5 | 63.0 69-74 
September. October. November. December. 
Years. 
Max.| Min. | Mean. | Max.| Min. | Mean. | Max.| Min. |} Mean. | Max.| Min. | Mean. 
MEME etialatia/0'n\s\ale'w'e wie wid civie'c'elc cles clsiale 70.0 | 65.0 67.5 65-0 | 54.0 60. 5 55-0 | 47-0 52-0 47-5 | 35-0 38.9 
OPES: coche Go gOUO UDI OOD TOD CTAATOOL 69.0 | 63.5 66.6 64.0 | 51-5 59-2 53-5 | 38-5 47-9 40.0 | 32.0 36.6 
DEMME aintelald) wins « afc'a dai gc :<1e\elelsio' cian 70.0 | 64.0 67.0 63-0] 51-5 57-6 52-0 | 40.0 46.3 41-0 | 31-5 34-4 
PAIS stil) oa) 51015 4) 5 -) 6 a/o\e\srm;o/s) 6) «<6 = 69.0 | 63.0 66. 4 64.0 | 54.0 59-6 54-5 | 44-0 48.2 44-5 | 38-0 40.0 
RAMI EU Meta atelvicts) tale: dais a'e's sic tutte sie lahevera 71.0 | 66.0 68. 5 65.0 | 56.5 60. 3 54.0 | 42.5 47-0 42-5 | 33-5 36.3 
BSIVERVERIS'. «Me sels sen hnes 71.0 | 63.0 67.20 | 65.0] 51-5 59-44 | 55-0 | 38.5 | 48.28 | 47.5 | 31-5 37-23 
@ Based doubtless upon an inexact observation, since this temperature is below the freezing point of sea water. 
Curves showing seasonal variations in the air and water temperatures at the Woods 
Hole station for five years are presented on chart 219. 
These curves are based upon 
the noon temperatures contained in the station records from 1902 to 1906, inclusive.? 
The ordinate for each day is the mean of the five years’ figures for that day. Such 
curves do not, of course, exhibit the extreme conditions, since maximum and minimum 
figures are neutralized in the process of averaging. The water temperatures are natur- 
ally those which chiefly concern us at present. 
It will be seen that the highest point in 
the curve showing these is at August 12, where the mean temperature is slightly over 71°. 
Reference to table 10 shows that the maximum temperature for August (and for the year) 
recorded during these five years is 74.5°. 
The lowest point in the curve is on February 
19, where a mean temperature of 30° is almost reached. The minimum for the entire 
¢ Cf. Edwards in First Report U. S. Fish Commission, with which these figures agree fairly closely. 
