=+ ERB AN Saee ee pti oid < ob coca vibe orchit onRRMESrataiear 8 2 gt * . ies i bode wae ieee -19- the data are shown separately, and other permitted comparison, data appear in columns headed with question marks for mesh, Table 9 shows for the paired tows the ratio of the activ- ity per unit weight in coarse mesh to that in fine (No.6/No.20, on both a wet and ash weight basis. Ratio of redicectivity in tows vith coarse mesh to fine mesh (#6A%20) on vet and ash veight bases. gir temlet tay = or No. 20 of 173/inch. usually either No. 6 of 74/inch Table 9. Beh we. wp PhaleeWare an _Date 1958 Belle Hike Crater Vera_ Ash Wet Ash 1.41 33 655 6/9 27) MS 49° =#1.23° 95 «96 -21 0.2500 iw wT 1.39 1.18 3.62 3.67 -59 .70 1.61 1.77 12.0 6.21 .78 55 .80 6.41 2.92 6.8 1.43 9ss.38 1.65 1.38 1.32 4h 1.85 1.97 7.50 6.56 -22 1.02 10/le2 36s HT 12/6 -31 -034 (1.56 Th 11/26 33.61 11/27 85 .62 1,82 4,21 11/27 12/3 42.60 12/17 18 89 .90 -3%6 Wet Ash 2.39 4200.71.09 11/26 Ash Leroy 8% 9/1 Wet Wide Passage Wet 2.25 Ash Deep Entrance 5/19 7/6 Wet Data from Tables 7 and 8. 1.11 -% 1.39 1.26 2.20 95 1.57 1.13 1.68 1,32 1.69 -98 1.12 83 Wat Ash TT 2.00 1.78 3.95 1.24 86 Between the northern localities of Belle Island and the Mike crater and the southern localities of Wide Passage and . ase ey RET EE Leroy Island, there was a difference using the t test, significant at the 2% level on the ash basis. The reason is not apparent for this association of high counts with fine mesh nets at northern, and with coarse at the southern and A oom ele on oe wl western localities. Whereas, in 1952 (WT-616) significantly higher radioac- tivity occurred in fine mesh net hauls than in coarse, the present data show wide variation. On the wet basis the coarse mesh was higher in 18 pairs and the fine mesh in 25 pairs, while on the ash basis the figures were reversed, the coarse mesh was higher in 25 pairs and the fine mesh in 18 pairs. Thus, neither wet nor ash basis showed a significant difference due to mesh size.