Meteorologic Office, 12th June, 1863.

“Messrs. Negretti & Zambra,

“The barometers which you have lately supplied to Her Majesty’s ships through this Office are much approved, being good for general service, afloat or on land.

“(Signed) R. FITZROY.”

[3] Vide C. Daubeny, F.R.S., “On Climate.”

[4] Vide Report of the British Association, 1862.

[5] See [page 42] for the Tables.

[6] The quotations in this section are from Tyndall’s Heat considered as a Mode of Motion.

[7] Dr. Daubeny, F.R.S., On Climate.

[8] Leslie On the Relations of Air, Heat, and Moisture.