444, REPORT—-1868. 
but is far greater in winter than in summer, and therefore the restlt of 
attempting to deduce the relative fall in different months from elevated 
gauges must fail, unless we can determine the correction required. This we 
have essayed to do by examining the results of the various gauges at different 
heights at the Royal Observatory Greenwich, as well as the experimental 
sets at Calne, Rotherham, &c. The results are embodied in the three follow- 
ing Tables. The construction and mode of using of these Tables is so obvious 
as to require no explanation beyond the headings of the columns and the 
examples given. It should, however, be mentioned that the values herein 
given are not assumed as perfectly correct, but rather as types of more de- 
tailed ones to be subsequently compiled. 
Greenwich, 1862-65. 
Totals and per cent. of Ground Fall. 
Ground 
gauge. 10 feet. 22 feet. 38 feet. 51 feet. 
3 a) js 3 jes 26 |se es |sd 
= aq jag FS aa (n= fav lps = Wh = Diag be = bye |; Ste Shp n> 
Year. 5 5 S55 5 S65 5 S65 6 (955 
| 8 |8m=| § |e hs} 8 [5&5] g@ |e bs 
< 4s | 4 0es | 4 eS [ogee 
January ............ 8°70 8:52 | 98 6-48 74 614] 71 4°98 57 
February ......... 3°51 3°18 | 9g 2°70,\|) 097 2°25 | 63 "72 | 49 
Mareh ............ 7°58 7°52 N99 6:23, 082 5°30).| 0x Agee 2577, 
Aygo ee caeseeseer ong 4°42 4°40 | 100 3°36 | 87 3°51 79 2°91 66 
Misiva Ra sacuticce tenes 10°47 |10°35 | 99 9°37 | 9° 8°53] 81 718 | 69 
CULT rade aderectcebice 9°17 9°03 | 98 7 fad Ay tac 7°61 83 6°66 | 73 
SRIy posta eersces 5714 4°96 | 96 4°34.| 84 4°34 | 84 3°57 | 69 
ATU PUB 2 zs53- aoe -E 10°08 9°83 | 98 8°93 | 88 8°43 | 84 636 | 68 
September ......... 7 52 741 | 98 613 | 81 6716 | 82 5:36, | e770 
October. «....s<:..02 12°86 |12°43} 97 |10°55 | 82 9°76 | 76 8°36 | 65 
November ......... 7°56 a TON Os Saznl 7O 522 | 69 #309 57 
December ......... 4°07 3°37 | 95 2°65 65 te iy 58 189 | 46 
IMIGANSI ce -tjeansusly maeees | 97°0 80°3 75°1 62°3 
Calne. ‘ Rotherham. - 
1 foot.| 20 feet. | 1 foot.| 10 feet. 20 feet. 25 feet. 
Year. Amount Arioant| Pas cent Amount Amount/Per cent] m unt Per cent!Amount Per cent 
—— | 
January ......... 3°36 | 3°00 | 89 ‘tik be ae . He Pe ee 
February ...... Bigs 1270 | 87 1°88 | 1°63 87 1°56 | 83 1°45 78 
(Marchis «3.22.5 3°27 | 2°79 | 85 go | 138 | 73 128 | 68 128 | 68 
shy OY el IRAN ie 3°23 | 2°93] 91 270.|| 2:391| 89 | 2:32 | 86 | 220)| se 
Myosin scp es 1'79 | 1°74] 97 ZAg.| 220) Or 2°16 | 89 2°18 | 90 
SUNG ii0v..i0c0s2]) 2°19 || 2a ge 2°02 | 1°88 | 93 1°87 | 93 1°84 | 91 
July veves.cicect 4] a QO Sees Oor fanos: 2°27 | 2°13 | 94 2°09 | 92 2°06 | 91 
August ......... 3°02 | 2°96 | 98 R225) A514 |. 98 3°09 | 96 3°21 | 99 
September ...... 1°79, | 3°71 | ‘96 2034 92) | “OS 189 | 93 189 | 93 
October™.-c--..8 2°86 | 2°72 | 95 2°08 | 190 | 91 1°86 | 89 1°83 | 88 
November ...... 1227 /EX28O) il) ge: 274 367) ||\".90 64.| 86 63] 85 
December ...... 1:67] 1°53} 92 | 1°53 | 1732 | 86 | 1:28 | Sq. | a25 ]) 8x 
| Mieamise ck. .225-, ay cc vee Bot | Pa e 35 S077 Wes 87'°2| ose 85°38 
