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vi

ADVERTISEMENT.

ago. The experiments are commencing, and the writer is glad that he has been one instrument in exciting their pursuit. The whole subject is, just now, of very increasing interest. The industrious student and the unprejudiced discoverer may yet gather not only facts, but fame.

Three of these Essays first appeared in "Bell's Weekly Messenger," whence they were immediately transferred to the “Morning Herald,” and perhaps to other prints ; the rest is offered to the reader's consideration for the first time. The necessity of being brief will excuse the author for here acknowledging, in general terms only, the kind assistance which has been afforded him by very many friends and correspondents.

CRINGLEFORD HALL, NORWICH,

April, 1851.

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