p.1

Memoranda Nov. 21. 1870

It would be well to apply an
"alarm" to the clocks of the several
observers to secure promptness etc.

To read the barometers to half
hundredths, using three decimals, the last
of which would be 0 or 5.

To record in separate columns

Observed height of Barometers

Height of attached Thermometer

Barometer reduced to 32 [degrees] Fah.

Barometer corrected for temperature and sea level.

requiring one more column in form No. 4.

In reduction to sea level the Buffalo
observer now adds .55 inch more than at
first; the Cincinnati [observer] put his
decimal point one figure too far to the left and
added .063 instead of .63. Duluth
sent the observed height without any
correction. There are indications of other irregularities