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1869.] WHITAKER SOUTH-DEVON " NEW RED. 155 It would be a work of time and trouble to measure the thickness of each division ; perhaps, indeed, it would be impossible to do so at all accurately; but I must draw attention to Mr. Pengelly's cal- SP4 ■i OB '^ fl 3 ® «» ID a ^ Wfipq CO 05 O 1— < (M II ■S-o HS CM* W m e^ ^ H- 1 i 'u 1 1 "73 p 'T? F^ 1 V? J2 ri*l .^ TS O ^ ns 53 a> m o3 a> as pqPMfirtfi CO "*' »C5 CO l> S^ <— ' 03 ™; fl3 "^ culation (from the dip and breadth of outcrop), according to which the whole formation may have a thickness of four miles or more *,
- Trans. Plymouth Inst, for 1862-63, pp. 28^0, and for 1864-65, pp. 40-46,
and Trans. Devon. Assoc, of Lit. Sci. & Art for 1863.
