OYSTER RESOURCES OF THE PACIFIC COAST. 347 
Table of hourly changes of surface-water temperature in parts of San I'rancisco Bay. 
[Reduced to monthly means. ] 
Off Market street and Union Iron Works, San Francisco. Mare Island navy-yard. 
= 35 - : a a) ot : ia a aay J i 7 oO 
= isco | b= S 16 29 Be A oo ny 5 a 
Time | o 78 | 8 ° a pr = ° 4. ° 2 5 a on 
of day.|~o |S) s) se | Ho | Pa] sa | oa fee | Ra | Het | Ho) 8S (TS 
ees cece) ecient ies: [eet Reet iment nt 
Ses eee Sh Sas hey (BS Bs OS te oe 
Sse te Na ates bie Once SO epee ole 
ORB P OBEien ORR sO) Hic] sOBHes |b Ounina fe OGY.) O8R. |OUR 8) OU) OUR | ORY: O ait OAR 
la.m.| 56.3 | 58.8 | 59.2 | 58.5 | 56.1) 53.5 | 52.5 | 59.1 | 53.5 | 57.0 | 54.3 | 48.9 | 42.5 47.3 
2a.m.| 56.2 | 5&5 | 59.0 | 58.4 | 55.9 | 53.5 | 52.5 | 59.2 | 53.5 | 56.8 | 54.0 | 48.9 | 42.5 }47.3 
3a.m.; 56.0 | 58.5 | 58.7 | 58.6 | 55.8 | 58.3 | 52.0 | 59.1 | 53.5 | 56.6 | 53.9 | 48.9 | 42.6 |74.1 
4a.m-) 56.0 | 58.7 | 58.5 | 58.6 | 55.7 | 53.3 | 51.5 | 59.2 | 53.5 | 56.6 | 53.9 | 48.8 | 42.5 |46.9 
5a.m.-| 56.1 | 59.0 | 60.7 | 58.7 | 55.7 | 53.4 | 50.5 | 59.7 | 53.2 | 56.6 | 53.8 } 48.6 | 42.3 47.1 
6a.m | 56.3 | 59.5 | 60.2 | 58.4 | 55.4 | 53.5 | 50.5 | 59.9 | 53.7 | 56.4 | 53.9 | 48.4 | 42.2 47.0 
7a.m-' 56.6 | 59.9 | 61.0 | 58.5 | 55.7 | 53.5 | 50.0 | 60.2 | 53.5 | 57.4 | 54.3 | 48.5 | 42.2 [46.9 
8a.m-} 56.9 | 60.3 | 61.2 | 59.0 | 55.9 | 53.8 | 52.0 | 59.9 | 53.7 | 59.2 | 54.9 | 48.9 | 42.8 /47.3 
9a.m-.| 57.3 | 61.2 | 61.2 | 59.4 | 56.6 | 54.0 | 53.0 | 60.1 | 53.7 | 59.4 | 55.3 | 49.1 | 43.1 [47.9 
10a.m.) 57.8 | 61.4 | 61.5 | 59.3 | 56.1 | 54.0 | 53.5 | 60.3 | 53.7 | 59.4 | 55.7 | 49.6 | 43.4 [48.0 
Jla.m.| 58.5 | 61.6 | 61.5 | 59.4 | 56.5 | 54.2 | 53.5 | 60.1 | 54.0 | 59.6 | 56.5 | 49.8 | 43.7 [48.2 
1 Dees | 58.6 | 61.8 | 61.0] 59.6 | 56.6 | 54.4 | 53.5 | 60.0 | 54.2 | 60.6 | 56.8 | 50.2 | 44.2 [48.5 
1p.m.) 58.9 | 61.9 | 62.0 | 59.6 | 57.1 | 54.7 | 55.0 | 60.3 | 55.2 | 60.4 | 57.5 | 50.3 | 44.8 |48.7 
2p.m.| 59.3 | 62.3 | 63.0 | 59.8 | 57.2 | 54.8 | 55.0 | 60.4 | 55.5 | 60.8 | 57.6 | 50.3 | 45.2 |48.8 
3p.m.| 59.4 | 62.2 | 62.7 | 59.7 | 57.2 4.8 | 54.5 | 60.3 | 55.2 | 60.6 | 57.77) 50.2 | 45.4 )49.1 
4p.m.) 59.3 | 62.1 3:0 19,7 | 57.2 | 54:9 | 54.0) 60.4 | 55.5 | 60.6 | 57.6 | 50.1 | 45.1 |49.3 
5p.m-| 58.9 | 61.9 | 62.3 | 59.5 | 57.2 | 54.6 | 53.5 | 60.5 | 55.5 | 60.0 | 57.2 | 50.1 | 45.0 {49.2 
6p.m-) 58.6 | 61.5 | 62.0 | 59.1 | 56.8 | 54.3 | 52.5 | 60.0 | 55.0! 60.0 | 56.5 | 49.8 | 44.9 |48.9 
7p.m-} 58.2 | 60.9 | 61.3 | 58.9 | 56.8 | 53.9 | 52.0 | 60.0 | 54.0 | 59.4 | 56.0 | 49.7 | 44.6 [48.5 
8p.m.} 57.9 | 60.3 | 60.0 | 58.7 | 56.6 | 53.7 | 52.0 | 59.9 | 54.0 | 59.4 | 55.7 | 49.5 | 44.3 [48.2 
9p.m-.| 57.3 | 59.7 | 60.0 | 58.8 | 56.5 | 53.7 | 51.0 | 59.9 | 53.7 | 59.2 | 55.5 | 49.3 | 43.9 |48. 2 
10p.m-} 57.0 | 59.3 | 60.0 | 58.8 | 56.3 | 53.8 | 51.5 | 59.8 | 53.5 | 58.6 | 54.9 | 49.1 | 43.6 [48.1 
l1p.m.} 56.9 | 59.3 | 59.7 | 58.7 | 56.1 | 53.6 | 52.0 | 59.7 | 53.5 | 57.4 | 54.8 | 49.0 | 43.3 |47.6 
Mid ..-} 56.7 | 59.0 | 59.3 | 58.5 | 56.1 | 53.5 | 52.0 | 59.5 | 53.7 | 57.4 | 54.4 | 48.8 | 42.9 |47.3 
Range -/55-72 |55-68 57-66 |56-61 |52-61 |50-59 |49-55 |56-62 |52-57 |54-62 [49-64 |42-57 |38-51 |40-45 
| 
| 
A series of temperatures taken in Oakland Creek from September 7, 
1890, to May 20, 1891, at 4 a.m. daily, range from 49.8° for December to 
64.9° for September. The temperatures are here reduced to means of 
ten days. 
Temperature of the water at the surface in Oakland Creek, San Francisco Bay, from 
September 1, 1890, to May 20, 1891. = 
| Taken by Coast Survey steamer MeArthur, Lieut. W. P. Ray, U.S. N., commanding. ] 
1890. oF. 1891. Osh 
Ag; 28:60) Sepp. ti... - 4-2: GAP aan COr Oeeerrs ae eee meas 50. 0 
SLE) Sua aye ly (Ne ok Ape ee Bee 63245 hoarse ton O eee eeemers corse 50. 6 
Sept. 18 to 27......<: Pothace a oe BSR OAM es GOs Onepaee reyscinnaere = 51.4 
Sept.28 to Oct. 7522. .-2.... BIO! || diameak LOMMCDRO=: saeeeer <1 51.2 
Oct tOyhe --eR eae EAS se. 495-20 Web. dO tOwOy we. aaeeces cess 50. 1 
OCA Zit eee wae nceee 49.9 || Feb. 20 to Mar.1 ....-------. 51.0 
Oct.:28to -Nova6lss 2-5. 54-.- SOP bars 2 CO My seme seer aan 53.8 
INOVaitabO LO eeeraem arenes Dos 2n|| vba U2 tOlei see aeeeee seers 56. 4 
Nov 17.1026 See ae eee ae. DATS: ML ATS 22 cho oles apeeeeemtrascts 0: 56. 2 
INOVe 27 SOuDeCh@uesememe ces 53. eApr.L topAprs kOe eee ence eas 57.1 
Dees 7; tolGt sce sae se sci: A983 Acpr. Ud sto; 20 eecirescciset ies 57.0 
WEG. U7 tONs lsc mernteleicisietacieastte AES eAtprs 21 tO Ot meme seisiee. tats are 58. 6 
Miaivel TOO sects cces ae tienne 61.4 
Myton Ole emisteters a sitieletare 61.4 
