Carpenter, William Benjamin, 1813-1885 · London : John Churchill · leaf 327
sewhere, forming a sort of rib thatseems designed to give firmness to the valve ; and its expan-sions are solid nodules of the same substance.* 175. The nature of the dehcate and regular markings, withwhich probably every Diatomaceous valve is beset, has beenof late years a subject of much… … Portion of Cell of Isthmia nervosa, highly magnified. remarked, that there is a much greater uniformity in thegeneral character of these markings, than was supposed whenattention was first directed to them; for what were at firstsupposed to be lines, are now resolved by objectives of large * These…
Microscopy
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