Walsh, David · London : Baillière, Tindall and Cox · leaf 30
he one that comesnearest to the centre denotes the specific gravity of theacid. For transport purposes most secondary batteries are heavy andcumbersome. To meet that objection, a small case has beendevised for the writer by Messrs. Peto and Eadford (Fig. 8). Itcontains six cells, giving thirty… … Fig. 7.—Secondary Cell.
X-rays · Radiography
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