It would greatly facilitate the comparison of the barometric
observations by projecting them in curves when all the proper
corrections have been applied. This may be accomplished by a much
smaller expenditure of time than may at first be supposed. A paper of
engraved squares on which the observations of twelve days may be laid
down on double the natural scale, would be very suitable for the
purpose.[4] The projection of each day's observations would occupy but a
short time; and should circumstances on any occasion prevent the
execution of it, when the ship was becalmed or leisure otherwise
afforded, it would form an interesting and useful occupation, and serve
to beguile some of the tedium often experienced at such intervals.

_Registers._--For the particular object in view the register need not be
very extensive. One kept in the annexed form will be amply sufficient.
It should, however, be borne in mind that none but _uncorrected_
observations should find admission; in point of fact it should be
strictly a register of phænomena as _observed_, and on no account
whatever should any entry be made from recollection, or any attempt made
to fill up a blank by the apparent course of the numbers before and
after. The headings of the columns will, it is hoped, be sufficiently
explicit. It is desirable in practice that the column for remarks should
embrace an entire page opposite the other entries, in order that
occasional observations, as well as several other circumstances
continually coming under review in the course of keeping a journal, may
find entry.

METEOROLOGICAL REGISTER kept on board ______ during her voyage from
______ to ______ by ______.

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