350 Meteorological Observations at Burlington, Vt. 
planting and increase of coral reefs is thus satisfactorily exhibited. 
The existence of large reef-islands in open seas, where the neigh- 
boring lands are mostly destitute of coral reefs, has. farther sup- 
ported our conclusions, as such islands are in general removed 
from the deleterious influences just mentioned. 
The modifications of form-and interruptions of reefs arising 
from abrupt or sloping shores, and tidal or local currents, have 
also been exemplified. The origin of the distant barrier has 
been traced to a sinking of the land which it once simply fringed ; 
aud the lagoon island to a continuation of this subsidence till the 
original land had disappeared. - bit 
his account of coral reefs and islands may be closed by a 
Statement or recapitulation of some deductions which have a 
special bearing upon geology. 
Art. XXX1L— Abstract of Meteorological Observations made 
at Burlington, Vt., in 1851; by Z. Tuompson. 
Tue location where the following observations were made, is 
one mile from the shore of Lake Champlain, and 256 feet above 
the lake (346 above the sea) in lat. 44° 29’, and long. 73° 11’. 
1851. THERMOMETER. BAROMETER, 
a TER. i ETER, 
2 MONTHs, Mean. | Highest. Lowest. Range. | Mean. Highest.’ Lowest. Range. 
ra 6 = Methea inches | Inches. Inches. 
January, ........../ 1960} 43 | -14 | 5% | 2973) 30:53) 28 "82 
February, .........| 2602| 53. | ~-17 | 70° | 29:90 3060) 2918) 142 
March, ...<...-....|'3835| 64 | - 9 | 66 29°74 30:30 29°30| 1°00 
sersteesss..| 4331| 62 | 90 | 42 | 2969 30-40) 2 1:10 
oo ee SPOS: 54138] 79 35 44 | 29°74 | 30-28 | 2905) 123 
NM LIAN. clk wees] 62971 OT 47} 44 | 2964) 3022; 29:18) 1°04 
WO Sos a: fosiee a 67'40| 88 48 | 40 | 2958 2984 2928) 056 
August,..... ayes g 568| 85 47 | 88 | 29°70, 2993) 2940, 053 
September, ..'...... 6058| 92 | 35 | 57 | 29:83) 3029! 29°34| 088 
stil ioh « ++-| 6109} 78 28°; 50 | 2968 2998) 29:22) 076 
November, ........| 81-74| 53 10 | 48 | 2967,.30-47| 29°00, 147 
Mersss-2.-/ 1858) 46 [-17 | 63 | 2969) 30:33/ 2907) 126 | 
Annual mean ...... 4454 109 | 2971. 1°89 
el Rosiedh eWeek WEATHER. | SNOW, WATER. 
MonTHs. _|_N. |N-E| E.|S. B) 8. |S.W] W.|NW. Fair [Cloudy] Inches Inchess 
January,..+.s} 7) 2)E) 2) 41] 01619 16 11 1:20 
|February, ... 5 1 Lat Ph est 3 | 138 15 8 1:90 
March 10) 271) O07} Of 8} 8) 90] 11 | 14 | 067 
A pril, se eneee 17 Pp 7) 1 8/17 13 0 1°67 
May, a ee ll be | Dade Och pe 1 ) 2/19 12 0 2°29 
une. 4 Line 0} 15 3 4/14 16 0 7:33 
July, -2.3....| TOT Pt eee $190! 11 0 | 38l 
ugust,...... 12) 2) O) 01 14) 149454 beg | op | 0] 182 
September,...)12 | 1/0] 0413} -1 24 28 7 0 aoe 
October, ..... 6| O0% d.baal fs 2117 14 0 3°56 
November, ...| 6 fs i 8 aT OT Ss ete 16 24 3°59 
December,..... 6 / 8/1' 1) 16) 0} 2] o}19| a9. | 14] 188 
| 105 | 15 10 | 10 |153 | I) 96°} Sq |dja | dsl Ti | 3183 
Hn 7 eee os | 1h 26] 84 aia | 151 | 7h 
