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1812.
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Æt. 20-1.

parts—of metallic copper, and that some of the copper discs had a coating of oxide of zinc. In this case the metals must both have passed through the flannel disc holding the solution of muriate of soda, and they must have passed by each other. I think this circumstance well worth notice, for, remember, no effect takes place without a cause. The deposition, too, of the oxide of zinc in the flannel was curious, and will tend to illustrate the passage of the metals from one side to the other. I cannot describe it with any effect, you must see it; but think of these things, and let me, if you please, Sir, if you please, let me know your opinion.

'And now, dear Sir, to conclude in a manner requisite for the occasion. I heartily beg pardon for thus intruding on your time, your patience, and your good sense. I beseech you, if you will condescend so far, to return me an answer on this occasion, and pray let the refusal of your correspondence be as gentle as possible. Hoping, dear A., that the liberty I have taken will not injure me in your good opinion, I cannot conclude better than by wishing you all the happiness you can enjoy, the completion of all your good and honest wishes, and full health until I communicate with you again, and for ever after.

'Dear A———, I am just now involved in a fit of vexation. I have an excellent prospect before me, and cannot take it up for want of ability: had I perhaps known as much of mechanics, mathematics,