TRANSACTIONS OF THE-SECTIONS. 33 
I find that several blanks occur in the course of the observations; also that the 
half-hourly observations on the 21st of the month are entirely discontinued. All 
this is not to be wondered at, since Mr. Grewe is now without any scientific assist- 
ant; and allowing for all the accidents of health and occupation, I consider that 
this gentleman deserves great praise for his diligence and perseverance in carrying on 
the observations as he has done. The Alten Meteorological Observations for 1843, 
1844 and 1845 do not contain a single blank, as Mr. Grewe and I made it a point 
to endeavour to obtain three years’ observations complete, so as to serve as a basis 
in comparing any observations that had been made at Alten before that time, or 
that might be made hereafter, and also to serve in comparing observations with any 
other part of the world. As those observations have been presented by you to the 
British Association, I have no doubt that they will prove highly interesting in assist- 
ing persons in their endeavours to find out meteorological laws or in following out 
any theories that meteorologists may advance. 1s 
The observations for 1846 and 1847, now forwarded by Mr. Grewe, and which 
you intend to present to the British Association, will prove interesting in conse- 
quence of what has already been done. 
_ These observations show, that the mean of the barometer for 1846 was 755°8432 
millim. or 29°75755 Engl. inch., and for 1847, 7559854 millim. or 29°76315 Engl. 
inch. 
The mean of the thermometer for 1846 was + 1°667 Centig. or +35°-0006 Fahr., 
and for 1847, +-2°594 Centig. or +36°-6692 Fahr. 
The mean fall of rain per day was, for 1846, 1°266 millim. or 0°04984 Engl. 
inch., and for 1847, 1°186 millim. or 0°04669 Engl. inch. 
The mean force of the wind was, for 1846, =1°611, and for 1847, =1°974 (accord- 
ing to the scale of forces adopted at Alten, viz. 1 = almost calm and 10 = hurri- 
cane ; these means will fall between almost calm and gentle breeze). 
The mean proportion of clear sky for 1846 was 2°502 parts, and for 1847, 2°796 
parts (the sky is supposed to be divided into eight parts). 
The highest range of the barometer for 1846 was 772°80 millim. or 30°42514 
Engl. inch., and the lowest range was 733°62 millim. or 28°88262 Engl. inch., 
being a total range for 1846 of 39°18 millim. or 1°54252 Engl. inch. : 
The highest range of the barometer for 1847 was 778°'10 millim. or 30°63380 
Engl. inch., and the lowest range was 721°40 millim. or 28°40152 Engl. inch., being 
a total range for 1847 of 56°70 millim. or 2°23228 Engl. inch. 
__ The highest range of the thermometer for 1846 was +28°°5 Centig. or -+ 83°3 
Fahr., and the lowest range was — 26°-0 Centig. or —14°-8 Fahr., being a total range 
for 1846 of 54°°5 Centig. or 98°1 Fahr. 
The highest range of the thermometer for 1847 was +29°°3 Centig. or +84°°-74 
Fahr., and the lowest range was — 19°°5 Centig..or —3°10 Fahr., being a total 
range for 1847 of 48°-8 Centig. or 87°°84 Fahr. 
From the foregoing it will be seen that 1847 was much warmer than 1846, and 
that the mean height of the barometer was greater in 1847 than in 1846, 
The total oscillation of the barometer was much greater in 1847 than in 1846, 
but the reverse was the case with the thermometer. 
The atmosphere was drier, the wind was rather more powerful, and the sky was 
clearer in 1847 than in 1846. 
I feel grateful that my humble labours, or rather amusements, and those of my 
excellent friend Mr. Grewe, have been deemed by you worthy of being introduced to 
the notice of the British Association of Science, and I beg to subscribe’ myself, 
Sir, 
Your obedient and humble Servant, 
To John Lee, Esq., LL.D., &c. (Signed) Joun Francis Cote. 
Hartwell. 
On two cases of uncommon Atmospheric Refraction. 
By Matruew Moceriper. 
‘About midday on the 27th of January last we saw a schooner which appeared 
erect and resting on the top of the high sand-hill east of the mouth of the Neath 
1848. 7 
