XVI. A letter from Mr. Turbevil Needham, to the President; concerning certain chalky tubulous concretions, called malm; with some microscopical observations on the farina of the red lily, and of worms discovered in smutty corn

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Abstract
Sir, Though you desired me, when I had the Satisfaction of waiting upon you at London some Weeks ago, to commit to Writing the Observations I had made upon that chalky