SECT. 1] 



THE FLOW OF HEAT THROUGH THE FLOOR OF THE OCEAN 



227 



4. The Results of Heat-Flow Measurements 



Measurements have been made in the Pacific by workers in ships of the 

 Scripps Institution (Revelle and Maxwell, 1952; Von Herzen, 1959; Foster, 

 1962) and by Uyeda et al. (1962). In the Atlantic, measurements have been 

 made by Bullard (1954), Bullard and Day (1961), Reitzel (1961), Gerard et al. 

 (1962), Nason and Lee (1963) and Lister (unpublished). The earlier Pacific 

 results are plotted in Figs. 6 and 7 and the Atlantic results in Fig. 8. These 

 figiires include unpubhshed results by R. P. Von Herzen and C. Lister which 



Fig. 8. Heat-flow measurements in the Atlantic ; the value in the north-west corner of the 

 figure is an unpublished result by J. Reitzel in which the recorder went off the scale. 



they have kindly allow^ed me to use. Lister has made a number of measure- 

 ments to the south of the area shown in Fig. 8 which lie in the range 0.8 to 2.2 

 (jLcal/cm2 sec. Reitzel has obtained 1.2 [j.cal/cm2 sec 500 km north-west of 

 Bermuda and Gerard et al. 1.0 to 1.8 [jLcal/cm^ sec in the western basin of the 

 North Atlantic. 



The values on the East Pacific Rise and on the Mid-Atlantic Ridge show^ a 

 large spread, the heat flow on the west of the rises being usually greater than 

 elsewhere and occasionally above 8 (jical/cm^ sec. This is shown by the histo- 

 grams in Fig. 9 and in the section in Fig. 10; it is also confirmed by further 



