. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. g j&y. Plate Group of 'cvli/idrica!^ tvpe dry Leclanche cells. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Donaldson, Peter Eden Kirwan. New York, Academic Press

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