1910] McEwen: Preliminary My drographic Report. 197 



Hourly Averages — (Continui A). 



Daily 



Date 0-3 3-6 G-9 9-12 12-15 15-18 18-21 21-14 Average 



9/2 19.6 



9/3 (2) 



9/3 18.33 18.42 18.5 17.92 17.(5 17.30 18.01 



9/4 (3) (0) (5) (10) (0) (0) 



Average 18.65 18.90 18.84 19.34 19.62 19.56 19.05 19.SS 19.22 



8/26-9/4 (19) (24) (34) (54) (58) (47) (20) (16) (237) 



9/3 17.0 15.87 



9/4 (8) (7) 



9/4 14.0 14.92 16.07 17.28 1S.07 16.48 16.55 



9/5 (6) (9) (9) (8) (9) (10) (8) 



9/5 16.2S 15.13 17.36 17.99 17.22 18.21 



9/6 (10) (S) (10) (8) (9) (5) 



FROM SAN DIEGO TO SAN CLEMENTE ISLAND. 

 From February 19, 1909. to February 20, a trip was made 

 to San Clemente Island from San Diego Bay, ninety temper- 

 ature and seventy-six density measurements being' taken. The 

 minimum temperature was 12.0°, the maximum 14.6°, the aver- 

 age being 13.57°. The minimum density was 1.02410. the maxi- 

 mum. 1.02488, the average being 1.02460. 



Hourly Averages. 



PROPERTIES OF THE INTERMEDIATE AND BOTTOM WATERS. 



From June 12 to July 28, 1908, there were twenty-four 

 temperature and density measurements taken in the San Diego 

 region. The maximum density was 1.02557. 



From June 8 to July 7, 1909, there were twenty-nine density 

 and twenty-seven temperature measurements taken in the San 

 Diego region. The minimum temperature was 6.5° and the 

 maximum density was 1.02556. 



During the trip to Cerros Island, from August 26 to Sep- 

 tember 5, 1908, there were nineteen temperature and density 

 measurements taken. The minimum temperature was 8.0 and 

 the maximum density was 1.02572. 



On February 19, 1909, there were five temperature and four 



